NEW YORK : Top seed Jannik Sinner broke through Daniil Medvedev's defences to win 6-2 1-6 6-1 6-4 in a seesawing U.S. Open quarter-final on Wednesday.

Sinner beat Medvedev in the Australian Open final earlier this year and left the Russian disappointed again in New York, closing out the match at Arthur Ashe Stadium with a forehand winner.

Medvedev, the 2021 champion, had beaten the Italian in the Wimbledon quarter-finals but could not crack the code this time. He did not help his own cause with 57 unforced errors.

Sinner will next play Britain's Jack Draper for a place in the final.