He reached the quarterfinals of the 1964 French championships and the
semifinals of the 1967 United States championships. He was a member of
the United States Davis Cup team in 1963 and 1965, and was ranked No.
11 in the world in 1965 and ranked in the United States top 10 five
times. He won five consecutive United States Open championships (1973
to 1977) in court tennis, an antecedent of tennis.