Garcia went into the match on the back of an upset win over third-seeded American Coco Gauff but was unable to get a foothold against the Floridian.

Garcia still appeared to be troubled by an injury to her right shoulder and received some treatment early in the second set.

Collins broke to go 5-3 up in the first set and then held serve for the set, then in the second set broke in the third game and never looked back as she wrapped up the win in one hour and 19 minutes.

Collins reached the semi-finals of Miami six years ago as a qualifier and at 53rd is the lowest ranked semi-finalist in the tournament. The 31-year-old American now has a 4-0 record against Garcia and has yet to lose a set to the Frenchwoman but said the numbers didn't tell the true story.

"I think against someone like Caro, it forces me to be more concentrated. I know I don't want to give her an inch or she can get in there," Collins said.

Collins will face the winner of Wednesday's other quarter-final between her compatriot Jessica Pegula and Russian Ekaterina Alexandrova, who knocked out world number one Iga Swiatek in the previous round.