
Marketa Vondrousova has pulled out of her US Open quarter-final against Aryna Sabalenka due to a knee injury, giving the World No 1 a walkover into the next round.
Vondrousova, the 2023 Wimbledon champion who missed last year’s US Open after undergoing shoulder surgery, had beaten two top-10 players in Jasmine Paolini and the in-form Elena Rybakina to reach the quarter-finals.