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

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

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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.

MORE TO FOLLOW

Coco Gauff celebrates her win against Belgian Elise Mertens at the US Open

Miami Heat superstar Jimmy Butler, Justin Bieber and his wife Hailey Bieber watch

Miami Heat superstar Jimmy Butler, Justin Bieber and his wife Hailey Bieber watch