I know, I know, easy for me to say. But debilitating cramps in 90 degrees blows my mind when we're talking about some of the fittest athletes in the world, even compared to other professional sports. Australia I can understand, the heat indexes can be crazy. Maybe it's wear and tear from other tournaments, but players in the top ~20 are very strategic about setting their schedules each season. And if it's not that, this was the second round. It would've been more understandable even in the next round, if he'd played two long matches before