World No. 1 Rory McIlroy hits tension-packed golf shots with the world's best players, but he had never been so nervous as when he was asked to play a little tennis with one of his girlfriend's pals. But then, McIlroy's girlfriend is women's tennis star Caroline Wozniacki of Denmark, the friend was Russian star Maria Sharapova and the request came during an exhibition match at New York's famed Madison Square Garden. On Tuesday, McIlroy arrived at Doral for his first tournament as the World No. 1, a World Golf Championships event that starts on Thursday, and admitted he was gobsmacked by his brief tennis foray the night before. __
