Table-toppers Hearts travel to Glasgow five points clear of second-placed Rangers, who conceded a late goal in a 1-1 draw away to Motherwell on Wednesday.
Reigning champions Celtic are a point further behind in third place but have a game in hand over both their title rivals.
Rangers were 13 points behind Hearts when German boss Rohl succeeded the sacked Russell Martin in October and seemingly out of title contention.
But they have since closed the gap and Rohl, asked Friday if this weekend's clash was a must-win game for Rangers, insisted it mattered just as much to Edinburgh club Hearts as it did the Light Blues.
"It's a big game to take the three points, but I think it's also the same for Hearts," he told a pre-match press conference.
"If you are 13 points ahead of a club and you drop maybe to two points, maybe there's also pressure on them.
"This is for both teams, both teams know what's about in this game.
"I think both teams have pressure on this game. If we can close to two points, it would be massive.
"Every game now is crucial. All the teams now know every result influences a lot, but every result is also not a final decision."