The Heat is On, and So Are the Questions for Tennis's Elite Novak Djokovic's defeat to Thiago Tirante at the Cincinnati Open was a stark reminder that even the game's greatest champions can be vulnerable to more than just mental pressure.
The 24 time Grand Slam champion has struggled with humidity in the past, but his loss on Wednesday was particularly jarring.
Djokovic admitted after the match that he had been dealing with an underlying condition for several years, which had left him feeling physically exhausted and forced him to vomit during the match.