Gauff beat 16-year-old Sun 7-5, 6-1 in Beijing on Monday to reach the fourth round. During a crucial point in the first set, Gauff raised her hand to stop play, complaining that a flickering advertising board had distracted her just as Sun was about to hit a winner. The umpire reviewed the incident and ordered the point to be replayed. Gauff won the replayed point, held serve for 5-5, and went on to win the set.
After the match, Gauff said she received a barrage of abusive messages. Writing on X early Tuesday, she said: "The amount of racist comments/direct messages I've received in the last few hours is insane." She added that people can disagree with her decision without being racist.
Gauff explained she was following the rules, as players are allowed to request video reviews when a distraction may have interfered with play. She said she spoke to Sun after the match and apologised. "Xinran's an incredible talent and player, I apologised for the situation at the end of the match and she completely understood," Gauff wrote. "I didn't like to see her so emotional... but this is the beginning of an incredible career."
The Women's Tennis Association (WTA) has introduced an AI-powered system to monitor online abuse. A study by the WTA and World Tennis found players were subjected to more than 12,000 abusive posts and messages in 2025, up from 8,000 the previous year.