Wimbledon 2015: Tommy Haas back on a high – but not Janko Tipsarevic

Injury is the spectre that stalks every professional athlete. It is not the playing, though that is demanding enough, but the training: the hours of kicking balls, or hitting them, or bowling them, and the running, twisting and stretching. The human body was not designed for professional sports, even those, like Usain Bolt’s, that appear to be.