World No. 7 Coco Gauff produced another gritty comeback to defeat fellow American and World No. 4 Jessica Pegula at Wimbledon on Tuesday and become the youngest player to reach the semi-finals of all four Grand Slams since Maria Sharapova.

The 22-year-old, playing in her first Wimbledon quarter-final, dug deep to fight back from a set down for a second straight match and beat Pegula 4-6, 6-3, 6-3 on Centre Court.