Tennis can be brutal, both physically and mentally. Players often talk about how back-to-back tournaments and long hours on court leave them exhausted. But grit and determination push them through. Still, what happens when the conditions turn cruel? Remember last month in London, when players complained about battling a heat wave at Wimbledon? Spectators fainted in the stands. Players were left drained by the end. Now, Cincinnati brings more chaos and scary news.

On Monday, Arthur Rinderknech walked out for his Cincinnati R32 against Felix Auger-Aliassime, determined to swing big. The 30-year-old battled hard but dropped the first in a tiebreak, 7-6(4). The second set turned tense. After Auger-Aliassime broke back for 2-2, Rinderknech headed for a towel, tried to sit—and collapsed onto hi

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