Serena Williams' Coach Defends Coco Gauff Against Racist Abuse at China Open

• Rennae Stubbs, Serena Williams' coach, defended Coco Gauff against racist abuse.
• Coco Gauff defeated Sun Xinran in the third round of the China Open.
• A disputed hindrance call during the match led to online abuse against Gauff.
• Stubbs condemned the racist abuse and defended Gauff's integrity.
• Gauff's victory and the controversy overshadowed the match.