September 4, 2018 -- NYC, NY

Dealing with all the heat and humidity, Roger was put to the test in his US Open Round of 16 match against Australian's John Millman. It was clear he wasn't feeling his best or performing at the top of his game, however he still managed to win the first set. U

Unfortunately, that's when Millman proved to be better conditioned for the humid conditions and the round of 16 match.

"I just thought it was very hot tonight," said Roger. "I guess I felt I couldn't get air. There was no circulation at all. For some reason I just struggled in the conditions tonight. It's one of the first time it's happened to me."

29-year-old Millman maintained an intense attitude and continued to fight and push 37-year-old. After uncharacteristic double faults and quick errors in points, the Australian beat the Swiss star 3-6, 7-5, 7-6(7), 7-6(3).

"John was able to deal with it better. He maybe comes from one of the most humid places on earth, Brisbane. I knew I was in for a tough one. Maybe when you feel like that, as well, you start missing chances, and I had those. That was disappointing. But at some point, also, I was just happy that the match was over."

This is his earliest exit in a Grand Slam since the 2015 Australian Open. Despite the loss, Roger is still currently in second position in the ATP Race to London and has the Laver Cup coming up later this month.