Rafael Nadal celebrates after beating Taylor Fritz in a men's singles quarterfinal match on Day 10 of the Wimbledon tennis championships in London on Wednesday. (AP photo)

Up in the Centre Court stands, Nadal’s father was waving his arms, motioning to the 22-time Grand Slam champion to quit. Not surprisingly, perhaps, he didn’t listen. Nadal stayed out there, adjusted his service motion and his strategy — and figured out a way to win.

With much of the crowd roaring and standing after Nadal’s best strokes, he twice erased one-set deficits against the 11th-seeded Fritz and emerged with 3-6, 7-5, 3-6, 7-5, 7-6 (10-4) victory Wednesday to reach his eighth semifinal at the All England Club.

“For a lot of moments,” Nadal said, “I was thinking, ‘Maybe I will not be able to finish the match.'”

He did complete it, but said he couldn’t be sure whether he will be able to play Friday against Nick Kyrgios, a 27-year-old Australian who earned his Grand Slam semifinal debut with a 6-4, 6-3, 7-6 (5) victory over Cristian Garin of Chile.

Rafael Nadal takes a drink at a change of ends as he plays against Richard Gasquet of France during their second round match at the French Open at Roland Garros in Paris on June 3, 2021. (AP file photo)

“I don’t know exactly what I have. It’s clear something’s not right,” said Nadal, who will get tests Thursday for an issue that first cropped up nearly a week ago but got much worse at 3-1 in the first set against Fritz. “I’m obviously worried.”

The other men’s semifinal is Novak Djokovic against Cam Norrie. The women’s semifinals Thursday are 2019 champion Simona Halep against Elena Rybakina, and Ons Jabeur against Tatjana Maria. Halep eliminated Amanda Anisimova 6-2, 6-4, and Rybakina defeated Ajla Tomljanovic 4-6, 6-2, 6-3.

Nadal got to his 38th career major semifinal by denying what would have been a first such appearance for Fritz, who beat Nadal in the hard-court final at Indian Wells, California, in March. That ended a 20-match winning streak for Nadal, who was bothered that day by a painful rib injury.