Rafael Nadal leaves Wimbledon hurt, like Roger Federer in 2021

Nadal owns a men's-record 22 Grand Slam titles, two ahead of Djokovic, who is 35, and Federer

It was impossible not to think ahead, to what awaits Rafael Nadal, while watching him sigh as he discussed how “very sad” he was about pulling out of the Wimbledon semifinals because of a torn abdominal muscle.

It was impossible not to think back to just a month ago, when Nadal at 36 became the oldest champion in French Open history, then expressed doubt about whether he would even show up at the All England Club because of chronic pain in his left foot that required nerve-numbing injections just so he could play in Paris.

And it was impossible not to think back, to a year ago at Centre Court, when Roger Federer exited after a loss in the Wimbledon quarterfinals, clearly compromised by a balky right knee that would soon require a third surgery in a span of about 18 months. Federer, who turns 41 in a month, has not played a match since.

These two exceptional athletes, forever linked as rivals and greats of the game, might be at different stages of nearing the ends of their careers, but one can't help but wonder whether Nadal's recent difficulty staying healthy — he also missed time this season with a rib injury, and the second half of last season because of his foot — could affect how much he is willing to keep pushing his body.

At some point, both will be gone from the sport. As will, at some point, the other member of the so-called Big Three, Novak Djokovic, who reached his men's-record 32nd Grand Slam title match by beating Cam Norrie 2-6, 6-3, 6-2, 6-4 on Friday in what became the lone men's semifinal.

“I don't think anyone's able to fill those shoes, to be honest with you,” said Nick Kyrgios, the player who benefited from Nadal's withdrawal and advanced to his first Grand Slam final.

“We'll never see a competitor like Rafa again. You'll never see someone wield a racquet like Roger, so effortlessly. You'll never probably see anyone who just wins and just plays the game just so good as ... Djokovic.”