Tennis 4 hours ago Modern tennis legend Rafael Nadal officially retires One of the world’s greatest tennis players, Rafael Nadal, officially retires following loss in the Davis Cup. Wake Up to Something Good 2:08 What color are tennis balls? 1:09 What is a ‘Golden Slam' in tennis? 0:46 Djokovic finally gets his Olympic gold medal 1:43 Team USA's Austin Krajicek secures silver in men's double tennis 2:57 US tennis stars on winning silver medals at men's doubles: ‘Experiences we'll never forget'
