World number 1 ranked male tennis players is a year-by-year listing of the male tennis players who were ranked as world No. 1 by various contemporary and modern sources. The annual source rankings from which the No. 1 players are drawn are cited for each player's name, with a summary of the most important tennis events of each year also included. If world rankings are not available, recent rankings by tennis writers for historical years are accessed, with the dates of the recent rankings identified. In the period 1948–1953, when contemporary professional world rankings were not created, the U.S. professional rankings are cited.
History of rankings
Before 1912
For the period between the birth of lawn tennis to 1912, few contemporary worldwide rankings exist. Some national tennis federations such as the USLTA (USTA) in the United States did create national rankings, however. Also, British publications ranking British players are listed. Retrospective world rankings made by the International Tennis Hall of Fame are also listed.
Between 1912 and 1973: opinion-based rankings and professional series rankings
Before the Open Era of tennis arrived in 1968, opinion-based rankings for amateur players were generally compiled either for a full year of play or in September following the U.S. Championships. Professional players were ranked by journalists, promoters, and players' associations in opinion-based rankings either at the end of the year or in the spring or summer when the world pro tours finished. There were also performance-based point ranking systems attached to professional tournament series in 1946, 1959, 1960, 1964, 1965, 1966, 1967 and 1968, and performance-based pro rankings from the pro tours in 1942, 1954, 1961, and 1963. Even for amateurs, however, there was no single official overall ranking that encompassed the entire world. Instead, national rankings were compiled by the national tennis association of each country, with world rankings being the preserve of tennis journalists or newspaper reporters. The end-of-year amateur rankings issued by official organizations such as the United States Lawn Tennis Association were based on judgments and opinions and not on mathematical formulae assigning points for wins and losses.
Professional tennis in Europe before 1926
Thomas Burke, tutor of the Tennis Club de Paris and former teacher of two-time Wimbledon champion Joshua Pim, was reportedly as good a player as the leading amateurs. Charles Haggett was the best English teaching professional during the early 20th century. In 1913, Haggett settled in the United States, having been invited by the West Side Tennis Club of Forest Hills, New York and became the coach of the American Davis Cup team. In practice matches, he beat the leading amateurs Anthony Wilding, Wimbledon winner and Maurice McLoughlin, Wimbledon All Comer's winner.
In the 1920s, Karel Koželuh, Albert Burke (son of Thomas Burke), and Roman Najuch were probably the most notable, as well as the best, of these players. The Bristol Cup, held at Beaulieu or at Cannes on the French Riviera and won seven consecutive times by Koželuh, was "the world's only significant pro tennis tournament." Koželuh went on to become one of the best of the touring professionals in the 1930s. He and Burke, however, were not listed among the top players before 1928, as this was the first year when a retrospective ranking was published for all the top players, amateur and professional.