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By Giri Nathan
[vc_empty_space height="15px"]I have always loved to watch Diego Schwartzman. Listed officially at 5 foot 7, observed in real life as closer to 5 foot 5, the Argentine is physically unlike any other player at this tier of tennis, yet has found a way to keep up with all the lanky big servers on the tour. It helps that he is one of the best returners alive, and the 100-mph forehands make it easy enough to forget what he lacks in size. There isn’t much recent precedent for what he’s accomplished; he found and followed a path all his own. I just wrote a whole profile to this effect, but I’m not sure I’ll ever beat the commenter who said Schwartzman “resembles a fire hydrant with a giant forearm attached to it that just crushes flat balls from eye-level all over the court.”