US Open: Coco Gauff reaches fourth round after fighting back to beat Elise Mertens and keep alive her hopes of a first Grand Slam… as Jimmy Butler and Justin and Hailey Bieber watch on

Coco Gauff put in a great kickback to reach the fourth round of the US Open and keep her hopes alive of winning a maiden Grand Slam singles title.

Gauff again dropped the first set, but dug deep to turn the game around Friday night at Arthur Ashe Stadium.

The 19-year-old American, the No. 6 seed, won the last 10 games to seal a 3-6 6-3 6-0 victory.

Miami Heat superstar Jimmy Butler along with both Justin and Hailey Bieber were caught on camera with shocked expressions during Gauff’s comeback.

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