After the US Open tennis, I reconfirm to need good health condition to play continuously and reach the champion.
When we see two of the BIG 4 skipped the USOpen tennis, Becuase Roger Federer had surgery for his knee and Rafa Nadal has also had surgery for his legs. Andy Murray had surgery on his coxa and restarted to play on the tour.
Dominic Thiem and Kei Nishikori also has the problem of wrist.
In the case of ladies, Serena William has a problem with hamstring and Naomi Osaka has a phycologic problem.
A lot of player can have injuries, so they can not play on the tour.
They are fighting on the court under big and big pressure, no people understand ever, to show the best performance all time and achieve champion
No good health, no good result.