Swiss tennis legend, Roger Federer, could hardly breathe in the US Open fourth round tie with John Millman, played under staggering heat temperature at 30C with high humidity levels.
The 37-year-old five-time tournament champion was beaten 3-6, 7-5, 7-6 (9-7), 7-6(7-3) by the Australian world number 55.
Federer said he was “happy the match was over” as he was “uncomfortable” all through the match.
“I felt I couldn’t get air. There was no circulation at all,” Federer said.
“It’s uncomfortable. Clearly you just keep on sweating more and more and more and more as the match goes on. You lose energy as it goes by.
“At some point also I was just happy that the match was over, I guess.”
Victorious Millman, by that victory became the first player ranked outside the top 50 to defeat the world number two.
He regarded the weather conditions in the tournament as “pretty brutal” whilst praising Federer as his hero.
Billed to face Novak Djokovic next in the quarter final rounds, felt guilty ending the tournament for the 20-time grand slam winner.
“I’m not usually much of a sweater. I mean, I was dripping,” Millman said.
“The conditions for the majority of this tournament have been pretty brutal.
“I found it pretty tough early on to hold onto the racquet. It’s kind of moving around in your hands.”
Millman, 39, admitted to feeling guilty, saying: “I felt a little bit guilty today because he didn’t have his best day, and that’s for sure.
“I have so much respect for him, what he’s done for the game.” He added: I’ve never played anyone’s reputation.”