By Jon Wertheim
December 27, 2013
Roger Federer hasn't won a Grand Slam since Wimbledon 2012, where he beat Andy Murray in the final.
Ben Stansa/AFP/Getty Images

Tennis will fall prey to more anti-doping contretemps. This is based more on common sense than a suggestion the sport is a cesspool. But consider the circumstances: you have an individual enterprise with incentives to cheat, especially when it comes to accelerating recovery. You have more injuries than ever (see below). You have players seeking incremental advantages, reading instructions that are often not in their native tongues. And a banned substance list that includes everything from recreational drugs to anti-hair loss medication.

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