Stan Wawrinka fought off punishing heat and a youthful challenge by French qualifier Ugo Humbert to earn your 7-6 (5) 4-6 6-3 7-5 win on Thursday and a spot in the You actually.S. Open third circle.
With temperatures at the Billie Jean King National Tennis Center once again nudging toward 100 degrees Fahrenheit (38C), Wawrinka and Humbert had trouble for nearly three hours together with 30 minutes in the shadeless oven this is the Grandstand Stadium court.
Wawrinka, who received the U.S. Open in 2016 but was not able to defend his title this past year after undergoing knee operation, had his fitness put to the test by the 20-year-old Humbert playing as part of his first Tour level affair.
Humbert let the three-times grand slam-winning Swiss recognize he was in for a long as well as sweaty afternoon after the initial set went to a tiebreak and then he leveled the match through the second.
But the barrel-chested Wawrinka’s existed up to reputation as a battler and grimly hung on to take the next only two sets.
Wawrinka, who upset 5th seed Grigor Dimitrov in the opening circle, now faces 25th seed products Milos Raonic after the big-hitting Canadian blasted earlier Frenchman Gilles Simon 6-3 6-4 6-4.