Rafael could use a little R&R. Defending tennis champion Rafael Nadal, currently ranked number one in the world, is pulling out of next week’s Wimbledon competition to tend to his knee problems. After two defeats this week at the Hurlingham Club, the Spaniard doesn’t feel up to the task: "Not to play Wimbledon is one of the toughest decisions in my career but the decision was made easier because I don't feel ready to compete at 100 percent," he said today at a press conference. For the record, Nadal is only the second reigning champ in the last 35 years to not defend his title. Goran Ivanisevic was forced to retire with a shoulder injury after winning in 2001.