The rally was alive, the crowd was leaning forward, and 16-year-old Sun Xinran looked poised to win the point. Then Coco Gauff stopped playing. Courtside screens had flickered mid-point, and after a brief discussion, the chair umpire ordered a replay. It was a routine officiating call by the rulebook.

What followed online was anything but routine. Within hours, Gauff's social media was flooded with what she described as an "insane" volume of racist messages. Rather than staying silent, the American fired back on X. "Hey everyone, you can dislike me or disagree about what happened without being racist," she wrote, adding a blunt clarification that mattered more than it should have had to: "I'm not a cheater or a thief.

" Gauff, ranked world No. 4 and a two-time grand slam champion, had done nothing against the rules. She had simply followed them, and that, somehow, was enough to provoke a storm. Sun, who had just won the US Open junior title and was making her WTA Tour debut on a wildcard, left the court distraught after falling 7-5, 6-1 in the third round.

Gauff, who knows exactly what it feels like to lose in front of a home crowd at a tender age, having reached the Wimbledon fourth round herself at 15, was quick to offer empathy rather than triumph.