Patrick Michael "Pat" Rafter (born 28 December 1972) is an Australian former World No. 1 tennis player. He twice won the men's singles title at the US Open and was twice the runner-up at Wimbledon. He was known for his natural serve-and-volley style of play. He became the first man in the Open Era to win Montreal/Toronto, Cincinnati and the US Open in the same year (1998); this achievement has been dubbed the American Summer Slam.