Coco Gauff won last year's French Open

American Coco Gauff cruised past Karolina Muchova in straight sets to reach her first Miami Open final.

The Florida-born 22-year-old dropped only two games to triumph 6-1 6-1 in one hour and 30 minutes.

Having been broken in the first game, Gauff won 10 games in a row to take control of the match against the 13th seed.

Czech Republic's Muchova also lost in the fourth round of this year's Australian Open to Gauff in straight sets.