Roger Federer recalled last year's US Open when he lost to the Australian John Millman in the fourth round.
The Swiss player dealt with humidity and he played a bad match.
"I suffered heat like never before. It was so hot already in the first match against Yoshihito Nishioka.
It takes time for the body to adapt. So the guys who grew or lived in hot conditions have an advantage", said the world No. 3.
In the past Federer trained in Dubai before the North American hard-court swing. Now as a father and husband he trains in Switzerland.
"It was hot, I trained hard. We trained when it was hottest. It was difficult, I was totally destroyed. But that's why I think I am more ready for the hotter days this year than the past season."
In an interview to AS Conchita Martinez commented on her job as a commentator: "I feel privileged to comment matches, some of them very emotional ones.
I have been doing it since 2006 and I had the opportunity to be involved in many important wins that are part of the history of our sport.
For me it's important to give the fan what the player can feel in the different moments of the match, speak of tactics but I also like to bring technical details and doing it easy so that any person can understand it.
Now I know some journalists better, especially the ones who were always connected to tennis.
The guys who I work with day by day in Grand Slams are like a family. After many years, I feel I have a respectful relationship with the press.
All the tournaments are different, whatever is this surface, all of them have something special.
The US Open can be tiring because it could take an hour ride to get to the tournament site. You can feel it during two weeks."