Federer is a GOAT-level tennis player, a superstar among superstars, he has won 20 Grand Slams, accumulated more than 100 titles in his career, just like Jordan in basketball, Schumacher in racing, has the strength to compete for the first person in the history of tennis. So for such a rare genius in hundreds of years, we must not use common sense to evaluate him, Federer can do things, not to mention ordinary professional players, even if the superstars of various generations are brought out one by one, it is rare to reach the same height as him.
Among the post-80s players, Roddick and Safin both left early at the age of 30, Nalbandian and Sodrin retired at the age of 31, and Ferrero and Gonzalez left at the age of 32. As for the previous generations, in addition to the two famous living fossils of the tennis world, Agassi and Connors, other superstars such as Sampras, Becker, Edborg, McEnroe, and Bjørborg did not conform to the so-called "law of 32 years old". So that's why I've repeatedly stressed that Federer's strength lies in his genius, in his ability to break the laws of objectivity and do what other superstars can't.
This is not without reason, and the reason why Federer's career has been able to continue to this day, and still maintain a strong competitiveness at the age of nearly 40, can be attributed to the fact that Federer has never been plagued by a truly fatal major injury in his long career of more than 20 years. For tennis players, the most serious and irreversible injuries are the hip joint, followed by the knee and ankle. The reason why the hip injury is fatal is that the human hip is very fragile, and one of the core parts of the tennis ball is the hip, so once the hip is injured, there is almost no possibility of full recovery.
At least in the history of tennis, no top player has shined after coming back from hip surgery. The most typical example is Murray, whose performance has fallen off a cliff after his comeback from surgery in 18 years, and there is still no sign of returning to the top. Federer's inspiration and genius are beyond doubt. If I remember correctly, of the ATP players of the past few years, it seems that only Kyrgios has successfully copied twice when he played against Nadal in Cincinnati in 18 years and against Rublev in Moscow in 18 years.
To this day, Federer's greatness is beyond doubt, to be honest with him, what I feel most deeply is not his pure tennis skills and those wonderful flashes of inspiration, but more of his love for his career, his desire for victory, and his continuous pursuit of transcending his own limits, perhaps we do not have his talent, but his qualities are worth many of us to think carefully, learn, and imitate.