Alice Marble (September 28, 1913 – December 13, 1990) was an American tennis player who won 18 Grand Slam championships from 1936 through 1940. Five of those championships were in singles, six were in women's doubles, and seven were in mixed doubles.

John Donald ("Don" or "Donnie") Budge (June 13, 1915 – January 26, 2000) was an American tennis champion who was a World No. 1 player for 5 years, first as an amateur and then as a professional. He is most famous as the first man to win in a single year the four tournaments that compose the Grand Slam of tennis. He was the first player to win a Grand Slam in 1938.

Pauline May Betz Addie (born August 6, 1919 in Dayton, Ohio) was an American female tennis player. She won five Grand Slam singles titles and was the runner-up on three other occasions. Jack Kramer has called her the second best female tennis player he ever saw, just behind Helen Wills Moody.

John Albert Kramer (born August 1, 1921, in Las Vegas, Nevada) was a champion U.S. tennis player of the 1940s. A World No. 1 player for a number of years, he is a possible candidate for the title of the greatest tennis player of all time. He was also, for many years, the leading promoter of the professional tennis tours and a relentless advocate for the establishment of Open tennis between amateur and professional players.

Margaret Evelyn Osborne duPont (born March 4, 1918) is a former American female tennis player. DuPont won a total of 37 singles, women's doubles, and mixed doubles Grand Slam titles, which places her fourth on the all-time list despite never entering the Australian Championships. She won 25 of her Grand Slam titles at the U.S. Championships, which is an all-time record.

Ricardo Alonso González or Richard Gonzalez, (May 9, 1928 – July 3, 1995), who was generally known as Pancho Gonzales or, less often, as Pancho Gonzalez, was the World No. 1 tennis player for an unequalled 8 years in the 1950s and early 1960s. During that period, he played as a professional. Completely self-taught, he was also a successful amateur player in the late-1940s, twice winning the United States Championships.

Althea Louise Brough Clapp (born March 11, 1923) was an American female tennis player who was born in Oklahoma City, Oklahoma, United States. She was one of the greatest volleyers in history and won 13 Wimbledon titles in singles, doubles and mixed doubles and 16 at the U.S. championships. She was inducted in the International Tennis Hall of Fame in 1967.

Kenneth Robert ("Ken") Rosewall AM MBE (born November 2, 1934 in Sydney, Australia) is a former professional tennis player who won the Australian, US, and French Open Grand Slam singles titles. He is considered to be one of the top male tennis players of all time.[1] [2] He had a renowned backhand and enjoyed an exceptionally long career at the very highest levels from the early 1950s to the early 1970s. He was one of the two best male players for about nine years and was the World No. 1 player for a number of years in the early 1960s.

Maureen Catherine ("Little Mo") Connolly (born September 17, 1934 – died June 21, 1969) was an American tennis player who was the first woman to win all four Grand Slam tournaments during the same calendar year. Connolly won the last nine Grand Slam singles tournaments she played, including 50 consecutive singles matches. Connolly recognized the downside of her tennis career, saying, “I have always believed greatness on a tennis court was my destiny, a dark destiny, at times, where the court became my secret jungle and I, a lonely, fear-stricken hunter. I was a strange little girl armed with hate, fear, and a Golden Racket

Lewis Alan ("Lew") Hoad (born November 23, 1934 in Glebe, New South Wales, Australia, died July 3, 1994 in Fuengirola, Spain) was a champion tennis player. In his 1979 autobiography, Jack Kramer, the long-time tennis promoter and great player himself, ranks Hoad as one of the 21 best players of all time.[1] For five straight years, beginning in 1952, he was ranked in the World Top Ten for amateurs, reaching the No. 1 spot in 1956.

Shirley June Fry Irvin (June 30, 1927) was an American female tennis player who was born in Akron, Ohio, United States. Irvin is one of a dozen persons to have won each Grand Slam singles tournament at least once during the person's career. She also is one of only five persons to have won each Grand Slam tournament in same-sex doubles as well.

Marion Anthony (Tony) Trabert (born August 16, 1930 in Cincinnati, Ohio) is a retired American tennis champion and longtime tennis author, TV commentator, instructor, and motivation speaker. In his 1979 autobiography Jack Kramer, the long-time tennis promoter and great player himself, included Trabert in his list of the 21 greatest players of all time.

Althea Gibson (1927-08-25 – 2003-09-28) was an American sportswoman who, on 1950-08-22, became the first African-American woman to be a competitor on the world tennis tour and the first to win a Grand Slam title in 1956. She is sometimes referred to as "the Jackie Robinson of tennis" for breaking the "color barrier."

Ashley John Cooper AO (born September 15, 1936 in Melbourne, Victoria) is a former tennis player from Australia, who was World No. 1 amateur in the late 1950s.

Maria Ester Audion Bueno, born October 11, 1939, in São Paulo, Brazil, is a female tennis player who won nineteen Grand Slam titles (7 singles, 11 women's doubles, 1 mixed doubles) during her career. Bueno won the singles title at Wimbledon three times and at the U.S. Championships four times.

Roy Stanley Emerson (born November 3, 1936) is a former Australian tennis player who won 12 Grand Slam singles titles and 16 Grand Slam men's doubles titles. He is the only male player to have won singles and doubles titles at all four Grand Slam tournaments. His 28 Grand Slam titles are an all-time record for a male player. Most of his titles were won in the final years of the period where the Grand Slam events were open only to amateur players, just before the start of the open era when professionals were admitted into tennis' most prestigious events.

Evonne Fay Goolagong Cawley AO MBE (born July 31, 1951, in Griffith, New South Wales, Australia) is a former World No. 1 Australian female tennis player. She was one of the world's leading players in the 1970s and early 1980s, when she won 14 Grand Slam titles: seven in singles (four Australian Open, two Wimbledon and one French Open), six in women's doubles, and one in mixed doubles.

Rodney George "Rod" Laver MBE (born August 9, 1938, in Rockhampton, Australia) from Australia who arguably was the World No. 1 player for seven consecutive years. He is the only tennis player to have twice won all four of tennis' Grand Slam singles titles in the same year — first as an amateur in 1962 and second as a professional in 1969. Laver has been rated as the greatest male player of all time by several experts and polls.