Stanley Roger Smith (born December 14, 1946 in Pasadena, California) is a former American tennis player who, with his partner Bob Lutz, was one of the most successful doubles teams of all time. Together, they won many major titles all over the world. Smith also won many singles titles, including the Wimbledon championship once and the US Open championship once. In 1972, he was the year-ending World No. 1 singles player.