Novak Djokovic sweated it out from behind the baseline to beat Australian John Millman 6-3 6-4 6-4 at the U.S. Open on Wednesday and set up a semi-final with Japan’s Kei Nishikori.
Djokovic, a two-times champion at Flushing Meadows, struggled with the humidity at Arthur Ashe Stadium but kept his cool mentally, saving the only break point he faced in the first set and wrapping up the opener in an hour.
“(I was) very tested,” Djokovic said. “Almost three hours. It’s midnight now. Credit to John for putting up a great battle.”
Millman is used to the searing heat in his native Brisbane, but needed to leave court to change with the score level at 2-2 in the second, telling the umpire he was unable to put the ball in his pocket because his shorts were soaked through with sweat.
The U.S. Tennis Association said in a statement that Millman was sweating so profusely that the moisture dripping onto court had made the surface too dangerous to play on.
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