(NEWSER) - Clay has long been the red-headed stepchild of the tennis world, with top pros like John McEnroe, Jimmy Connors, and Pete Sampras almost taking pride in never winning a French Open. The term “clay-court specialist” was a veiled insult. Now, though, world No. 1 Rafael Nadal is a clay-court wonder, and elite players have embraced extensive clay training, the Wall Street Journal reports. More»