Looking in fine form after two days of rest, Roger Federer equaled Jimmy Connors’ Open-era record by reaching his 14th Wimbledon quarterfinal and added to his own mark by making it at least that far at a Grand Slam tournament for the 48th time.
Federer, a seven-time champion at the All England Club, has not dropped a set in the tournament through four matches after beating unseeded American Steve Johnson 6-2, 6-3, 7-5 at Centre Court on Monday.
Johnson was making his debut in the fourth round of a major.
The No. 3-seeded Federer hadn’t played since Friday, when he was the only man to finish a third-round match. He next faces No. 9 Marin Cilic, the 2014 US Open champion, who advanced when Kei Nishikori retired from their fourth-round match.
The fifth-seeded Japanese player was trailing 6-1, 5-1 when he decided to stop the match, giving Cilic a spot in the Wimbledon quarterfinals.
Nishikori warmed up for Wimbledon by playing on grass in Halle, Germany, but he pulled out before his second match because of a rib injury.