It has been quite a day at the Wimbledon tennis tournament in London. No fewer than seven players withdrew or retired from a match and two of the biggest names in the game were upset. Maria Sharapova, the third seed, was disposed of by a qualifier. And seven time men's champ Roger Federer was eliminated in four sets by a qualifier as well. Rafael Nadal, the fifth seed and former three time champ, was knocked out in the first round on Monday.