Djokovic, Swiatek cruise into 3rd round, Tsitsipas the latest upset victim at U.S. Open

Novak Djokovic and Iga Swiatek rolled to straight-set victories to move into the third round at the U.S. Open on Wednesday, fighting not only their opponents but sticky, 85-degree Fahrenheit (29-degree Celsius) weather on the hottest day at the tournament so far.

"That's why we train several hours a day in humid, hot conditions so we can be ready for whatever awaits you on court," the second-seeded Djokovic said after a 6-4, 6-1, 6-1 victory in Arthur Ashe Stadium over 76th-ranked Bernabe Zapata Miralles of Spain.

"I still have the hunger," said the 36-year-old from Serbia who owns 23 Grand Slam titles. "I still got it."

Magnificent from Nole!