John Albert Kramer (August 1, 1921 – September 12, 2009) was an American tennis player of the 1940s and 1950s. He won three Grand Slam tournaments (the U.S. Championships in 1946 and 1947, Wimbledon in 1947). He led the U.S. Davis Cup tennis team to victory in the 1946 and 1947 Davis Cup finals. Kramer won the U.S. Pro Championship at Forest Hills in 1948 and the Wembley Pro Championships in 1949. He won world professional championship 2-man tours in 1948 (against Riggs), 1949/50 (against Gonzales), 1950/51 (against Segura), and 1953 (against Sedgman). He was ranked world No. 1 amateur player for 1946 by Pierre Gillou, Harry Hopman and Ned Potter. He was ranked World No. 1 amateur player for 1947 by John Olliff, Pierre Gillou and Ned Potter. In 1948 he was ranked the U.S. No. 1 professional in the USPLTA contemporary rankings for U.S. pro tennis play. Some recent tennis writers have considered Kramer to be the World No. 1 player from 1946 to 1953, spanning his last amateur years and early pro years. He was the leading promoter of professional tennis tours in the 1950s and 1960s, signing many of the great tennis players of the era to professional contracts. Kramer was one of the most important people in the establishment of modern men's Open-era tennis. Tennis career Amateur player Kramer began his tennis career by taking lessons from renowned teaching professional, Dick Skeen. Within a year, he was playing junior tournaments. He played on the Montebello High School tennis team with George Richards. Because of his obvious ability and his family's lack of money, he came under the guidance of Perry T. Jones. at the Los Angeles Tennis Club (LATC). Jones was the President of the Southern California Tennis Association (SCTA). Kramer traveled many hours each day from his home in Montebello, California, to play tennis at the LATC and the Beverly Hills Tennis Club. He was able to play against such great players as Ellsworth Vines, Bobby Riggs, and Bill Tilden. He was the National Boys' Champion in 1936, and the winner of the 1938 National Juniors Interscholastics. He competed occasionally in men's tournaments on grass courts in the East. He won matches against nationally ranked men such as Elwood Cooke. He also played with high school teammate, George Richards, who later was nationally ranked. Kramer competed at the U.S. National Championships seven times from