US Open tennis 2025: Sinner survives, Gauff and Osaka set up last-16 meeting – as it happened

Jannik Sinner was tested in a four-set fightback against Denis Shapovalov, while Coco Gauff and Naomi Osaka both claimed gusty victories

Gauff, looking more relaxed than she did the other night against Vekic, skips from 0-15 to 0-30 to 0-40 on Frech's serve. Three early break points. And she then drags Frech to one corner and then the other, before dispatching the forehand winner. That'll shake off any nerves. Gauff's got the break and leads 2-0.

Musetti has pressed the accelerator on Louis Armstrong. From 2-2, he now leads 5-2, and then flashes a forehand pass on his way to set point on Cobolli's serve. Cobolli cooly finds a way to hold. But Musetti soon has three set points on his own serve, and he serves out the 6-3 set to love. He's the first player with a set to his name on day seven.