There will be no U.S. Open for Roger Federer this year, and after his announcement on Sunday that he will have yet another knee operation, it is time to question whether he will play tennis on tour again.
For now, Federer, one of the greatest athletes of this or any era, does not intend to retire, but after turning 40 last Sunday and after two operations on his right knee in 2020, he is well aware that the odds are heavily against him.
He is an optimist, no doubt, long inclined to see the water bottle as half full.