– Two men's matchups in the round of eight are set at the U.S. Open: No. 1 Novak Djokovic vs. No. 18 Feliciano Lopez and defending champion Marin Cilic vs. No. 19 Jo-Wilfried Tsonga.

Djokovic on Sunday lost a set for the first time this tournament — and responded by stomping on a racket while it leaned on his red bag next to a changeover chair, earning a warning from the chair umpire. But he reached the quarterfinals at a 26th consecutive major by beating 23rd-seeded Roberto Bautista Agut 6-3, 4-6, 6-4, 6-3.

That's the third-longest men's streak all-time.

Bouchard withdraws

Eugenie Bouchard, a 21-year-old Canadian seeded 25th in the women's singles draw, withdrew from the tournament, citing a concussion she sustained in a locker-room accident.

Tournament director David Brewer said Bouchard was injured late Friday night, after her first-round mixed doubles victory. With the locker room empty and dark as Bouchard entered for an ice bath, he said, Bouchard slipped on the recently cleaned floor and fell, hitting her elbow and head.

Bouchard had been in the midst of a modest revival at the Open.

News services