Federer battles, Djokovic cruises, del Potro out in Shanghai

SHANGHAI — Roger Federer was stretched to three sets for a second consecutive match to reach the Shanghai Masters quarterfinals on Thursday. Nevertheless, the top seed insisted he was content with how he’s playing.

Federer defeated Roberto Bautista Agut of Spain, 6-3, 2-6, 6-4, a day after being taken the distance by Daniil Medvedev of Russia.

“I’m actually quite happy,” Federer said. “Bautista really had to raise his level of play in that second set to stay with me. I mean, he really caught fire, I thought. I served, I think,

80 per cent in that second set and got broken twice.”

Novak Djokovic cruised through his second-round match, but Juan Martin del Potro had to retire after hurting his right knee in a fall.

Federer led Bautista Agut by a set and a service break when he became entangled in a fight that lasted until the second-to-last game of the third set.

Bautista Agut, a finalist here in 2016, finally offered Federer an opening to take control by surrendering his serve in the ninth game of the third set.

Federer will play eighth-seeded Kei Nishikori, a finalist in Tokyo last week, in the quarter-finals. Nishikori ousted Sam Querrey, 7-6 (7), 6-4, on Thursday.

Third-seeded Del Potro, who has been playing with a cold throughout the week, was playing Borna Coric when he fell near the end of the first set. Del Potro had the knee wrapped but called it quits after losing the first set 7-5.

Djokovic earned partial revenge when he beat Marco Cecchinato, 6-4, 6-0.

A Masters event is a level below a Grand Slam.