Kei Nishikori withdrew from the US Open on Sunday due to injury, the tournament announced.

The former World No. 4 withdrew from other tournaments earlier this North American hard-court swing due to a left knee injury. 

[ATP APP]

Nishikori in June returned to action for the first time since October 2021. The Japanese star immediately found his form, winning an ATP Challenger Tour title at Palmas del Mar. After competing in two more Challenger events, he reached the Atlanta quarter-finals. But Nishikori has not competed since and now will have to wait to make his return to Grand Slam action. 

The 33-year-old will be replaced in the draw by Australian James Duckworth, who will take on Brazilian Felipe Meligeni Alves in the first round.