http://espn.go.com/espn/commentary/...alberto-contador-drug-cases-reopen-old-wounds Wouldn't surprise me if Nadal indulges in a bit of 'libel tourism' at the High Court in London. In any other universe, even though he has never been linked to performance enhancers and has never failed a drug test, Nadal and tennis would be at the center of the doping question. The game has become more powerful, more physical and more grueling, most recently evidenced by the epic five-hour, 53-minute Australian Open final between Nadal and Novak Djokovic. Big servers such as Canada's Milos Raonic, America's John Isner, Croatia's Ivo Karlovic and Argentina's Juan Martin del Potro routinely top 135 mph. Nadal, never a big server, won the 2010 U.S. Open over Djokovic because, for two weeks, he did something he'd never done before: He became a big server, adding roughly 20 mph on average to his serve -- the equivalent of a low-90s pitcher hitting 98 on the gun. Nadal hit 130 mph on the radar gun during that championship fortnight, and attributed the increase to a grip change to continental. But he'd never reached that velocity before, and hasn't done it consistently since.