PARIS—There was a point in Casper Ruud’s opening match Monday at Roland Garros where the two-time finalist thought he would soon be on his way back to Norway.
Five match points had come and gone against Roman Safiullin in the third set, but the dizziness and cramps he felt due to a rising body temperature had kicked in well before Ruud was a point away from reaching the finish line—and getting inside to cool off.
“It started kind of sneaking up on me towards the middle of the third set,” he would tell press. “I think when I broke him to 3-1, I started feeling a tiny bit of tendency of cramp in my calves, and I was thinking, ‘Oh, shoot, here we go.’”

