No. 1 Jannik Sinner falls to Daniil Medvedev in 5 sets at Wimbledon quarterfinals

Top-seeded Jannik Sinner was treated by a trainer and left the court during the third set, seemingly surged in the fourth and then faltered again in the fifth, eventually losing to Daniil Medvedev 6-7 (7), 6-4, 7-6 (4), 2-6, 6-3 in the Wimbledon quarterfinals on Tuesday.

"It's always tricky, because you want to play more points to make him suffer a little bit more — in a good way — and at the same time, you know that he at one point is going to say, `OK, I can not run anymore so I'm going to go full power,"' the fifth-seeded Medvedev said. "And that's what he did."

It was not immediately clear what was wrong with Sinner, who had his heart rate checked while sitting on the sideline before heading to the locker room. The 22-year-old from Italy returned after about 10 minutes and resumed playing, but lost the first game back at love.

After getting broken by 2021 U.S. Open champion Medvedev to fall behind 2-1 in the third, Sinner requested medical attention and leaned back in his chair at Centre Court. He rested his head in a hand at one point while speaking with the trainer before they headed toward the locker room.

During a later changeover, Sinner draped a towel over his head. While he did regain his usual verve, particularly on his booming forehand, and pushed the match to a fifth set — the 36th this fortnight and the most at any Grand Slam tournament in the Open era, which dates to 1968 — Sinner could not get over the line.

"He was not feeling that good … and then he started playing better," Medvedev said.

Medvedev began finding the space to deliver more winners, compiling 13 in the closing set alone, and broke for a 3-1 lead, then held for 4-1 and was on his way back to the semifinals.

The Russian lost to eventual