Novak Djokovic’s run is over, but not because he lost his match on Sunday.

Djokovic defaulted from the US Open after he accidentally hit a line judge in the neck when he hit the ball back off his racket in the opening set of his match with Pablo Carreno Busta.

Djokovic immediately realized what he had done and approached the line judge, clearly concerned for her safety. As players who hit another person on the court are automatically disqualified from the competition, Djokovic is headed home.

American Jennifer Brady rode her sets win streak into the US Open quarterfinals on Sunday. She knocked off number 17 seed Angelique Kerber 6-1, 6-4 in the day’s opening match to reach her first Grand Slam quarterfinal.

Alexander Zverev marched into the quarter-finals after 6-2 6-2 6-1 in just 94 minutes against Davidovich Fokina at the Flushing Meadows for the first time.

The Spanish world number 99, who knocked out Cameron Norrie on Friday, was hampered by an ankle injury in the third set.

Zverev will play Croat 27th seed Borna Coric next in New York. Coric beat Australian Jordan Thompson 7-5 6-1 6-3.

Naomi Osaka had little trouble getting past Estonia’s Anett Kontaveit late on Sunday night.

Osaka beat Kontaveit (Kontaveight) in straight sets, 6-3, 6-4, earning her place in the quarterfinals for the first time since 2018. Osaka bested Kontaveit at the Western & Southern Open less than two weeks ago, too, though she had to rally back after dropping the first set in that match in Ohio.