It's so hot at the U.S. Open that one participant is warning that a player is "gonna die"

New York — Soaked with sweat as the temperature neared 95 degrees on the hottest day at this year's U.S. Open, 2021 champion Daniil Medvedev walked slowly to towel off between points of his victory Wednesday, looked into a courtside camera and issued what sounded like a mix between a warning and a plea.

"You cannot imagine," he said. "One player (is) gonna die, and they're gonna see."

"The only thing that is a little bit, let's call it dangerous, is that the question is: How far could we go?" Medvedev, a 27-year-old Russian seeded No. 3, said after eliminating Andrey Rublev 6-4, 6-3, 6-4 to reach the semifinals at Flushing Meadows for the fourth time.