Analysis of information sources in references of the Wikipedia article "Jack Kramer" in English language version.
His father was tennis legend Jack Kramer, considered the number one player in the world from 1946 to 1953
Dissertations. 2848
Jack Kramer, twice national amateur singles tennis champion, and hero in America's last two Davis Cup matches with Australia, Wednesday joined the professional ranks at an annual salary of $50,000, largest contract ever offered a tennis star.
Jack Kramer of Los Angeles today gained official recognition as the best professional player in the United States. He drew the no. 1 spot in the 1948 rankings of the Professional Lawn Tennis Association