Jack Kramer
![Kramer in the late 1940s](https://upload.wikimedia.org/wikipedia/commons/f/f3/Jack_Kramer.jpg)
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 Bobby Riggs), 1949/50 (against Pancho Gonzales), 1950/51 (against Pancho Segura), and 1953 (against Frank Sedgman).
Kramer 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 most accomplished tennis players of the era to professional contracts. Kramer played an important role in the establishment of modern men's Open-era tennis. Provided by Wikipedia
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