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14:37 GMT - CLAYTON 1-1 HARRYSSON
Clayton starts the second set strongly, breaking clear in the opening leg and tidying up 80 with treble 20 and double 10 to put himself in control.
Harrysson responds immediately. He steadies the tempo, controls the leg and checks out 71 via 13, 18 and double 20 to hold with Clayton nowhere near a finish.
The momentum swings decisively towards the Swede in the third leg. Clayton sits on 100, but Harrysson steps in with a chance at 124 and executes it superbly, going 20, treble 18 and bullseye to break throw.
Harrysson closes the set in spectacular fashion, landing another monster finish, dismantling 149 with treble 20, treble 19 and double 16 to seal the set 3-1. Clayton can only shake his hand in acknowledgement. We're all square!
14:25 GMT - CLAYTON 1-0 HARRYSSON
Harrysson strikes first. He capitalises on Clayton missing the bull from 90 and calmly tidies up 50 with 18 and double 16 to take the opening leg. The Swede looks unfazed, composed and entirely comfortable on the stage.
World number five Clayton responds. He lands the first maximum of the match and follows it with a stunning 141 checkout via treble 20, treble 19 and double 12, completing a 12-dart hold that snaps momentum back in his favour.
Harrysson regains control in the third leg. Clayton drifts away from a finish and the Swede takes advantage, missing double eight and double four from 76 but returning to pin double four to hold and move one leg from the set.
The fourth leg drags Clayton back in. A 140 sets up 121, which he cannot convert, but sharp thinking allows him to reduce the score to 64 and then pin double 16 to force a deciding leg.
In the decider, Clayton blinks first. He reaches 86 and takes the unconventional route of 18, 18 before missing the bull. Harrysson cannot punish, failing to find a treble from 121, and Clayton pounces. He returns to clean up 39 with seven and double 16, sealing the set 3-2 against the throw.
14:09 GMT - Up next, we have Welsh wizard Jonny Clayton taking on Swedish debutant Andreas Harrysson.
Can the sublimely bearded Swede continue his fairytale, or is it The Ferret's year at Ally Pally? Ryan Searle awaits the winner.
14:02 GMT - RESULT: WOODHOUSE 2-4 RATAJSKI
Ratajski starts the sixth set with authority and immediately tightens the vice. He controls the opening leg from the first visit, reaches a finish in 13 darts and pins double 16 to move ahead without Woodhouse threatening a response.
Woodhouse clings on in the second leg. Ratajski applies steady pressure, but Woodhouse finds double 10 at the first attempt to stay alive, knowing a break is now essential to extend the match.
The moment slips away in the third leg. Woodhouse has time and territory, staring at 207 with repeated visits, but produces two poor turns at exactly the wrong moment. Ratajski senses the opening and slams the door shut, drilling double 20 to edge within one leg of victory.
Ratajski finishes clinically. Woodhouse steps up with 100 to save the match, but cannot find a treble. That leaves 41, and although Ratajski misses his first dart at double 16, he corrects instantly, pins the second and ends the contest.
Ratajski takes the set 3-1, the match 4-2, and books his place in the quarter-finals, where he'll face defending champion Luke Littler.
The Pole averaged 96.68 - almost in line with his tournament average - and pinned 45 per cent (14/31) of his finishes.
13:52 GMT - WOODHOUSE 2-3 RATAJSKI
Woodhouse starts the fifth set with purpose. He fires in two maximums, dominates the scoring phase and converts double 16 at the second attempt to complete a 12-darter and strike first.
Ratajski responds immediately and reaches a finish after 12 darts and pins double 16 at the first time of asking to level at 1-1, keeping the pressure firmly on Woodhouse.
Woodhouse suffers two cruel bounce-outs at exactly the wrong time in leg three, handing Ratajski an opening. The Pole misses a single 20 that would have set up double 20, briefly offering Woodhouse a reprieve. Woodhouse steps in, gets a dart at double 20, but misses just above the wire. Ratajski does not hesitate. He returns and pins tops to break, putting himself one leg away from the set.
Ratajski closes ruthlessly. A superb 153 visit puts him firmly in control of the deciding leg. He misses his first dart at double 16, but steadies and drills the second to take the leg, the set, and a 3-2 lead in the match.
With five consecutive sets now going against the throw, Ratajski moves to within one set of the quarter-finals.
13:41 GMT - WOODHOUSE 2-2 RATAJSKI
Woodhouse seizes the initiative immediately. He opens with a maximum, dictates the leg from the outset and converts his second attempt at double 20 to secure a vital early break.
He presses again in the second leg, controlling the scoring despite a loose visit of 40 that briefly invites Ratajski back into contention. When the pressure peaks, Woodhouse steps in with his final dart and pins double 16 to move 2-0 clear.
Both players lose fluency in the third, and the leg drags. Woodhouse squanders chances to close the set, missing at double seven and double two, and Ratajski stays patient before capitalising, pinning double 10 with his 22nd dart to keep the set alive.
Woodhouse responds instantly. He launches the decider with another maximum, controls the pace from the first visit and repeatedly finds double 16 with authority. When the opportunity comes, he takes it cleanly, sealing the leg and the set 3-1. We're all square again!
13:28 GMT - WOODHOUSE 1-2 RATAJSKI
Woodhouse begins the set solidly, edging the opening leg after both players stumbled on the doubles. He misses twice at tops but was handed a reprieve when Ratajski failed on double 16, allowing Woodhouse to convert at the third attempt and move ahead.
Woodhouse wonderfully produces eight perfect darts, the Alexandra Palace crowd rising in anticipation of a nine-darter. The moment arrived, the dart left his hand, and it dropped well below double 12. In the same visit, his focus unravels, busting when aiming for double six after drifting into the wrong double bay.
Ratajski steps in and punishes ruthlessly, taking out 86 with a double 16 to level the set and swing momentum in his favour.
Woodhouse fails to reset. Ratajski capitalises with a composed 13-dart leg, again pinning double 16, to move 2-1 ahead.
Ratajski cleaned up 72 on double 18 to seal the set 3-1 and retake the overall lead at 2-1.
13:18 GMT - WOODHOUSE 1-1 RATAJSKI
Woodhouse steadies and, under pressure on the Ratajski throw, he strikes twice in the treble bed and breaks with a composed 44 checkout via single 12 and double 16.
Ratajski continues to score heavily, firing in 126 to leave 56, but Woodhouse responds with the checkout of the match so far, dismantling 110 with treble 20, 18 and double 16 to hold. Ratajski misses double 16 for a 106 finish in the next leg, Woodhouse is punished on double eight, putting himself in position to level the match.
Ratajski reaches a finish first in the decider but stalls on 164, leaving 64. Woodhouse cannot take out 104 but reduces cleanly to 48. Ratajski then misses both darts at double eight, and Woodhouse pins 16 and double 16 to take the set 3-1.
13:00 GMT - WOODHOUSE 0-1 RATAJSKI
The contest begins scrappily, but with clear intent from both players. Woodhouse has the darts and reaches a finish first on 113, yet fails to convert, opening the door for Ratajski. The Pole makes heavy weather of 32, drifting inside the board repeatedly, but Woodhouse could not capitalise either, missing three darts at double 16. Ratajski eventually p double three to break and establish early control.
Woodhouse responds with the first maximum of the match and applies pressure with a look at 170, setting up 36. Ratajski could not convert 108 and Woodhouse broke straight back on double 18, restoring parity.
Ratajski misses double 16 for a 131 checkout, Woodhouse squanders 77 with two darts wide of double 10, and Ratajski punishes decisively, taking out tops to complete a hat-trick of breaks.
The Polish Eagle closes the set in style, landing his first maximum to leave 47 before cleaning up 15 and double 16. He averaged north of 106 in the set and took it 3-1 despite rarely holding throw.
12:50 GMT - First up, Luke Woodhouse looks to reach the quarter-finals stage for the first time in his career against Poland's Krzysztof Ratajski, who is enjoying a fine run of his own.
The players are at the oche!
12:30 GMT - We're back!
Toda,y the fourth round action continues as the business end of the PDC World Darts Championship really starts to pick up.
Here's how the afternoon session looks:
Luke Woodhouse v Krzysztof Ratajski
Jonny Clayton v Andreas Harrysson
Monday, January 29th
22:55 GMT - That's it from us tonight, see you again tomorrow!
22:52 GMT - Luke Littler powered into the PDC World Darts Championship quarter-finals with a high-octane 4-2 victory over Rob Cross at Alexandra Palace on Monday night, surviving a mid-match surge from the former champion before closing with a level of scoring that bordered on absurd.
Read our full report: Luke Littler overcomes Rob Cross to reach World Championship quarter-finals
22:48 GMT - Luke Littler faced a few boos in his post-match interview, and honestly, looked a little flustered by it...
"Can I just say one thing - you guys pay for tickets, and you pay for my prize money, so thank you for my money, thank you for booing me," he told Sky Sports.
"I just had to hold, Rob broke me, I broke him back.
"I just saw the stats then- I wasn't thinking of anything- I just wanted to win.
"It was hostile, no one wanted me to win. They were wrong.
"It is not in reach just yet, you have got to get to the final."
22:36 GMT - RESULT: LITTLER 4-2 CROSS
Voltage threatens a huge 167 finish at the start of the sixth leg, before Littler calmly responds to hold with double 12.
Littler takes a unique route to take out 95, but misses tops, while Cross takes out a double 18 finish to hold and make it 1-1.
Littler opens the third leg with a 180, while Cross responds with two of his own, taking us up to 21 for the match. He takes out 20 via double 5 to break Littler's throw. He now needs just a hold to make it 3-3 in sets!
The Nuke needs a break here. He gets to a finish first against the throw, but Cross applies pressure with a massive 180. Littler sets up a great tops to finish, but Cross has a go at 82 first. He gets one dart at tops for a level game - but misses. Littler pins it for a vital break, and now he's throwing for the match.
Both players are averaging just shy of 120 in set six, which is quite phenomenal. Fair play to Cross for making a contest out of this one.
Another 180 for Littler leaves him on 164 and then 68. Cross looks defeated. A 16, 12, tops finish takes out 68 and a fired-up Littler celebrates as he heads into the quarter-finals.
Littler averaged an excellent 106.58 to Cross's 98.92. He hit a whopping 17 180s and 15 40s, and hit 43 per cent (15/35) of his doubles.
22:26 GMT - LITTLER 3-2 CROSS
Cross is throwing to stay alive in this match, and takes out a nervy double 8 to hold the first leg.
Littler replies with the 15th 180 of the match, registering five perfect darts before wiring a sixth.
Littler is averaging 104.41 for the match, while Cross is on 96. Littler has just taken his chances. The Nuke comfortably holds in the second leg via tops. Littler can't take out 161 for a break of throw, leaving Cross to finish off 83 with double 9 under pressure to make it 2-1 to Voltage in the set.
Littler gets a long look at a finish on his throw, leaving 24 after 12 darts. He eventually takes it out for a 14-dart leg to make it 2-2.
A crucial leg now, then. Cross is finding another gear, so Littler responds with a maximum, his 12th of the match. A stunning treble 19, 19 and bullseye finish takes out 126 for Cross, and suddenly it's 3-2 in sets!
22:11 GMT - LITTLER 3-1 CROSS
Littler throws first in the fourth set. Cross has a finish first, but he misses double 5 to take out 130. Littler fails to capitalise on his favourite double 10, but Cross fluffs his own lines on double 2. Littler does eventually punish to make it 1-0 in the set, and it's potentially a crucial hold for the world number one.
Cross leaves double 16 to level the set and takes it out. Both players exchange maximums as Littler looks to hold. With 81 to take out, treble 19 and double 12 are pinned with relative ease for an 11-darter that makes it 2-1 in legs.
Littler is in command now and looking confident. He hits his 10th 180 of the match - his 30th of the tournament. He leaves 121, but just narrowly misses the bullseye. Crossagain struggles with his finishing, missing the bullseye himself.
Littler finally takes out 25 via double 10 to secure the break and take the match to 3-1 in sets.
22:03 GMT - LITTLER 2-1 CROSS
Cross with the darts to kick off the third set. Littler's seeing a lot of his attempts at treble 20 veering off into the treble 5s, and it looks like it's irking him. Still, a 180 leaves him on 86 after nine darts against the throw, but double 7 eludes him. Cross steps up to take out 90, but he narrowly misses the bull. Littler hits double 7 to pinch the first leg.
The world number one hits back-to-back maximums to leave 41 after nine, eventually mopping it up for an 11-dart hold.
Both players are hovering around 33 per cent on their doubles, but Littler's knocking around 105 for the match at this point - and around 125 in this set.
Littler takes out an excellent 128 via treble 20, bullseye, turning to the crowd and shrugging his shoulders as he romps to take a 2-1 lead in sets.
21:53 GMT - LITTLER 1-1 CROSS
Littler has the darts to start the second set. Cross comes out with his first 180 of the night. Littler leaves 98 but misses two attempts at double 19, Cross has a look at 109 and sinks it via double 16 to break and clinch the first leg of set two.
Trebleless visits begin to haunt Littler, handing an advantage to Cross. The Nuke rebounds with a 180, naturally, to put the pressure on. Cross can't finish 76, but Littler does not capitalise. Cross takes out double 10 to go 2-0 up in the set. Littler looks unamused as Cross showboats.
So unimpressed, in fact, Littler kicks off with a maximum. Cross hits the sixth 180 and is playing some mind games, by the looks of things. Littler leaves the big fish. He wires the second treble to leave 65, which he takes out to make it 2-1 to Cross in legs.
Cross is throwing for the set. Both are averaging a little over 100. Littler roars as he sinks his fifth 180, leaving 136. Cross gets a look at 72, but misses double 16. Littler misses tops, and Cross returns to take out 32 and deliver Littler's first lost set at this World Championship.
21:38 GMT - LITTLER 1-0 CROSS
Cross has the darts and throws first. It's a modest start scoring-wise for both players. Cross reaches a finish first, takes a look at 86, but leaves 36 on the board. Littler narrowly misses tops for 115, and Cross misses three darts at double 18. Littler pins tops to break in the first leg.
Littler lands the first maximums in the second leg, racing to a 44 finish in nine darts. He misses double 10 for a 12-dart leg, but Cross isn't on a finish. Littler misses three goes at double 5, but Cross can't take out 117. Littler returns again to take the second leg.
Cross leaves 170 in the third leg but can't get it going. Littler has the same but can only leave 80. Voltage leaves double 18, and he pins it to claw a leg back with a hold of throw.
The Nuke is throwing for the set, and he's averaging around 99, roughly 10 more than Cross. He leaves 164 after nine darts, with Cross nowhere near a finish. Littler comes back with 70 on the board, which goes out via tops to secure the first set.
21:28 GMT - The walk-ons are about done, so here we go!
21:16 GMT - Up next, it's our main event of the evening, a juicy one between reigning world champion Luke Littler and 2018 champion Rob Cross.
21:11 GMT - Ryan Searle hit a phenomenal 20 140s in that match, averaging just over a ton and hitting 50 per cent (12/24) of his doubles.
Smashing stuff from Searle! He'll face either Jonny Clayton or Andreas Harrysson.
21:10 GMT - RESULT: HURRELL 0-4 SEARLE
A big 171 puts Searle on the cusp of a break of throw, but he narrowly misses his double to take out 94. He comes back for double 4, which goes out in two darts to make it 1-0 in the set.
Searle's averaging is creeping up, but it's Hurrell's doubling captulation that's telling the story here; he's down to just 18 per cent on his checkouts.
Searle takes out 56 to win the second leg in 14 darts, making it 2-0 in legs. Heavy Metal is a leg away from the quarter-finals.
Hurrell stops the rot with a double 19 at the third attempt to claw a leg back, but Searle has the darts in hand for the set. He's first to a finish with 138 on the board, but he leaves 44. A tops finish seals the deal as Ryan Searle reaches the World Championship quarter-finals for the first time in his career.
21:02 GMT - Searle is looking collected out there, averaging just over 100 and hitting 50 per cent of his finishes. Hurrell's early good start looks to have worn off big time.
21:01 GMT - HURRELL 0-3 SEARLE
The momentum continues to be with Searle as the third set gets underway, with the world number 20 racing to the first leg and his fifth on the bounce.
Hurrell finally manages to stop the rot, levelling the set at 1-1 to hold after taking out 80 - albeit after briefly getting his foot caught in the oche.
Searle then struggles to take out 54, but Hurrell misses three attempts at tops to take the leg. Searle comes back to take out double 1 and effectively steal a hold.
Searle can't take out 138 for the set, leaving Hurrell on double 18. He misses all three of them again. Searle misses double 10, Hurrell comes back but busts his score. Searle pins double 5 for the set.
20:47 GMT - HURRELL 0-2 SEARLE
Hurrell leaves the door open for Searle to take the first leg, but he can't take out 110. Hurrell's doubles start evading him, and Searle comes back to break: 1-0.
Searle sinks 18, double 20 to seal the second leg and putting Heavy Metal firmly in control of set two. Hurrell comes out with a 180. Searle then breaks with an impressively calm treble 19, 12, tops finish to take out 109 and make it 2-0 in sets.
Searle averaged 104.86 in that second set, which was done and dusted in double quick time. A big set is required for Hurrell next.
20:36 GMT - HURRELL 0-1 SEARLE
Searle pins tops to seal a nervy hold of throw in the opening leg. He can't take out 138 but leaves 40 to break in the next, but Hurrell claws it back to level at 1-1.
Hurrell hits his first max of the evening, and backs it up with a second in his next visit. Searle pins tops though to restore his lead.
Both players are averaging in the high 90s to low 100s in this first set. In the fourth leg, Hurrell gets a look at 136 with Searle not on a finish, and he sets up a tops finish. He pins it for a 16-dart hold of throw.
Searle has the darts in the deciding leg. Hurrell hits a timely 180 to take the initiative, but he struggles to make it count and leaves 156. Searle hits a 140 to leave 61, regaining control of the set, but he fluffs his lines on tops. Hurrell misses his first at a double at a crucial moment, allowing Searle in to pin double 5 to take the first set.
20:15 GMT - Up next, we have James Hurrell versus Ryan Searle, kicking off the fourth round action!
20:14 GMT - World number 11 Josh Rock has his sights set firmly on the title after that commanding performance against Callan Rydz.
"I was a man on a mission, but it was on the back of my mind, I want to say sorry to Callan and his family for the loss of his grandad," Rock told Sky Sports.
"I am up here to do a job, and I did my job, but I want to send my condolences to the Rydz family.
"I think I had to go a set down to pick up. It was time to wake up after the first set- happy with the performance and the win also.
"I am not here to make the numbers up; I am here to win the title.
"If I keep playing the way I know I can, I can win the title.
20:10 GMT - An excellent display to kick off the evening from Josh Rock, who sets up a fourth-round clash with Justin Hood.
He averaged 98.98 - including well over 100 in sets two and three - and pinned nine 180s, finishing 41.94 per cent (13/31) of his doubles.
20:08 GMT - RESULT: ROCK 4-1 RYDZ
Rock races to an early hold as he hunts down a place in the fourth round.
Rydz leaves 130, but opts for a setup with Rock not on a finish. He takes out 72 to level the set at 1-1.
The Englishman has upped his average in this set, but Rock moves within one with a tops finish to take out 57. Rydz needs a break and a hold to survive, now.
Rydz is looking beaten as Rock continues to find the treble 20, hitting his eighth of the match to leave 81. He narrowly misses double 13, and Rydz takes out a decent 110 to stay alive.
Rock is throwing for the match. Another 180 rolls in. He leaves 157 with his opponent nowhere near. A stunning treble 20, 20, double 16 takes out 112 to seal a spot in the next round for Rock!
19:58 GMT - It's 10-7 in legs to Rock, and he's one set away from the last 16. Rydz needs to find something special here.
19:56 GMT - ROCK 3-1 RYDZ
Rydz hits back with the darts to hold the first leg of the fourth set and stop a run of four legs without reply.
Rock takes out double 12 to level the set after a miscount from Rydz. Rocky lands an opportunistic 177 to leave 110, but it doesn't go. Rydz takes out tops on 60 to make it 2-1 in legs as we still await a ton-plus finish in the match.
With 72 on the board, Rock takes it out on tops to hold, meaning Rydz desperately needs to hold his own here. A wobbly 45 opens the door for Rock, but a trebleless visit for Rock means he can't capitalise. Suddenly, both players are seeing their scoring plummet, but Rock steps up to take out 83 and clinch the set.
19:47 GMT - ROCK 2-1 RYDZ
Rock is averaging 97.39 going into the third set, while Rydz is hovering around 93.
Rock has the darts to start the set. He hits the eighth maximum of the match to leave 36 after nine darts. He misses all three at it, though, but Rydz misses the bullseye to take out 132. Rock mops up to take the first leg.
Another 180 for Rock, who looks in the groove, and he takes out 86 on the bull to take a significant advantage in the set.
The third set goes to Rock as he checks out in 15 darts. He averaged just shy of 110 in that set, yikes.
19:39 GMT - ROCK 1-1 RYDZ
Rydz comfortably holds throw to open the second set.
Rock has the opportunity to bounce back with a 12-darter, but eventually mops up double 16 with his 15th. The Northern Irishman then hits seven perfect darts to set up the nine, but narrowly wires a treble 20 before leaving 48, which goes out for an 11-dart leg.
With darts in hand for the set, another 180 follows. Rydz responds in kind and hits another to set up a nine of his own. With 141 on the board, Rydz wires the eighth dart but unbelievably leaves two remaining on the board, which he manages to pin first time for a ridiculous 10-dart leg, sending the set to a decider.
Rock has upped his average from 86.58 in the first set to around 105 here, but it's Rydz with the darts. Still, Rock races to leave 48 after 12 darts, taking out 16, double 16 to level the scores with a break of throw.
19:27 GMT - ROCK 0-1 RYDZ
Rock has the first throw and chances to assert early control, twice threatening ton-plus finishes, including a visit that left 158.
Missed darts at double one open the door, and Rydz steadies enough to pinch the leg on double 10.
Rydz pulls clear with superior scoring, only to wobble on the doubles from 78. Rock failed to punish on tops from 71 and Rydz escaped again, this time pinning double 6 to move two legs clear.
Rock finally finds rhythm in the third leg, landing a maximum and backing it up with a 105 to apply proper pressure. He can't convert 120, but crucially returns to tidy up on tops from 60, keeping the set alive.
A pair of 140s put him firmly ahead before a miss at double 19 briefly threatens to prolong matters. He returns to pin double 8 and seals the set, pausing to look skyward.
19:15 GMT - The players are on their way!
18:57 GMT - Before all that, though, we have the last match of round three between 11th-ranked Josh Rock and Callan Rydz.
Rock's one of the favourites for the competition, but Rydz is no stranger to a deep run, twice reaching the quarter-finals at Ally Pally - including last year, when he was finally beaten by eventual runner-up Michael van Gerwen.
They're scheduled to start at 19:15 GMT.
18:31 GMT - James Hurrell produced one of the shocks of the World Championship so far by knocking out world number four Stephen Bunting in a pulsating seven-set battle, prevailing 4-3 after outlasting the highest seed to fall at Alexandra Palace so far on Saturday.
He now has a huge opportunity to continue the fairytale story and reach the quarter-finals at the expense of world number 20 Ryan Searle, who beat Martin Schindler 4-0 on Sunday.
The winner will face either Jonny Clayton or Andreas Harrysson.
18:09 GMT - Luke Littler is yet to drop a set so far at this year's World Championship - could 2018 champion Rob Cross give The Nuke something to think about tonight?
Their head-to-head record would strongly favour Littler in this one; he's won 13 of the last 16 meetings between the pair:
18:00 GMT - In case you missed it, in the afternoon session Kevin Doets rallied past 15th seed Nathan Aspinall 4-3 to roar into the last 16 of the PDC World Darts Championship.
The Dutchman ignited at the end of an undulating tie in London, rattling off three ton-plus finishes in the final six legs of the clash, which went all the way to a deciding set.
"That was insane!" Doets told Sky Sports. "I started off rough. I was lucky to be 2-2, but then I should have been 3-2 up. He hit the 170 to go 3-2 up, but after that I was just on fire, I couldn't miss any more.
"This is what you dream of. This is my second year in a row in the last 16 and I want to go even further."
Elsewhere, Charlie Manby battled some finishing trouble to beat a wilting Ricky Evans 4-2 and set up a fourth-round clash with 10th seed Gian van Veen, and debutant Justin Hood continued his impressive run with a 4-1 win over Ryan Meikle.
Read more: Doets ignites to dump out dejected Aspinall from World Darts Championship
17:59 GMT - Welcome to Flashscore's Darts Tracker!
We'll be across all the action at Alexandra Palace tonight as we head into the business end of the PDC World Darts Championship this evening.
We also have one final match from the third round:
Josh Rock 4-1 Callan Rydz (round three)