Quarter-final updates from Flushing Meadows
Shelton wins after night of sweat and tears
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Rybakina has won four of her five meetings with Zheng, including two three-set victories this year. But Zheng was earlier in her comeback from elbow surgery then, the 2024 Olympic champion is a totally different proposition now, carrying the momentum of seven successive match wins in New York having come through qualifying - and the belief she can turn around any deficit after coming from 5-0 down in sets against both Madison Keys in the third round and Iga Swiatek in the last 16.

Here come Zheng and Rybakina, Zheng stepping on to court wearing headphones, not that there’s much noise to drown out yet at 11.35am New York time. Both already look extremely focused with their game faces on.

• Potopova sends Anisimova out at Flushing Meadows

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Last night Serena and Venus Williams – with their combined age of 456 - blew a five-point lead in the deciding tie-break as their return to the grand slam doubles stage ended in defeat, 6-3, 6-7 (6), 7-6 (7) against Chan Hao-ching and Maya Joint. Serena must be sick of the sight of Joint – given her singles comeback was also halted by the Australian in the Wimbledon first round this summer – but having come so close to victory in both matches, she may well be encouraged enough to continue. Serena and Venus chose not to do a post-match media conference last night – so it’s not clear what their next plans are.

A big cheer on Grandstand – despite the fact Zheng is facing an American – as she holds at the start of the second set. Anisimova is still a break down, 3-2, against Potapova, while Taylor Fritz – the pick of the American men in the first week - is warming up on Arthur Ashe against Francisco Cerundolo, the 24th seed from Argentina.