Lleyton Glynn Hewitt is an Australian former world No. 1 tennis player. He is the most recent Australian man to win a major singles title, with two at the 2001 US Open and 2002 Wimbledon Championships. In November 2001, Hewitt became, at the time, the youngest man to be singles world No. 1 in the ATP rankings, at the age of 20 years, 8 months and 26 days, though this record was surpassed in 2022 by Carlos Alcaraz, who ascended to the top at 19 years, 4 months and 7 days. He won 30 singles titles and 3 doubles titles, with highlights being the 2001 US Open and 2002 Wimbledon singles titles, the 2000 US Open men's doubles title, back-to-back Tour Finals titles in 2001 and 2002, and the Davis Cup with Australia in 1999 and 2003. Between 1997 and 2016, Hewitt contested twenty consecutive Australian Open men's singles tournaments, his best result being runner-up in 2005. He was also the runner-up at the 2004 US Open.
Rodney George Laver is an Australian former tennis player. Laver was the world number 1 ranked professional in some sources in 1964, in all sources from 1965 to 1969 and in some sources in 1970, spanning four years before and three years after the start of the Open Era in 1968. He was also ranked the world number 1 amateur in 1961 by Lance Tingay and 1962 by Tingay and Ned Potter. Laver's 200 singles titles are the most in tennis history. This included his all-time men's record of 10 or more titles per year for seven consecutive years (1964–1970). He excelled on all of the court surfaces of his time: grass, clay, hard, carpet, wood.
Roger Federer is a Swiss former professional tennis player. He was ranked world No. 1 by the Association of Tennis Professionals (ATP) for 310 weeks, including a record 237 consecutive weeks, and finished as the year-end No. 1 five times. He won 103 singles titles on the ATP Tour, the second most of all time, including 20 major men's singles titles, a record eight men's singles Wimbledon titles, an Open Era joint-record five men's singles US Open titles, and a joint-record six year-end championships. In his home country, he is regarded as "the greatest and most successful" Swiss sportsperson in history.
John David Newcombe AO OBE is an Australian former professional tennis player. He is one of the few men to have attained a world No. 1 ranking in both singles and doubles. At the majors, he won seven singles titles, a former record 17 men's doubles titles, and two mixed doubles titles. He also contributed to five Davis Cup titles for Australia during an age when the Davis Cup was deemed as significant as the majors. Tennis magazine rated him the 10th best male player of the period 1965–2005.
Anthony Dalton Roche AO MBE is an Australian former professional tennis player.
Ramanathan Krishnan is a retired tennis player from India who was among the world's leading players in the 1950s and 1960s. He was twice a semifinalist at Wimbledon in 1960 and 1961, reaching as high as World No. 3 in Potter's amateur rankings. He led India to the Challenge Round of the 1966 Davis Cup against Australia and was the non playing captain when Vijay Amritraj and Anand Amritraj led India into the 1974 Davis Cup finals against South Africa.
Paul McNamee is an Australian former doubles world No. 1 tennis player and prominent sports administrator.
Jonas Lars Björkman is a Swedish former professional tennis player. He is a former world No. 1 in doubles, and also a former world No. 4 in singles. Björkman retired from professional tennis after competing at the 2008 Tennis Masters Cup doubles championships. As of 2019, he is ranked in the top 40 on the all-time ATP prize money list with over $14.5 million.
William Bowrey is a former Australian tennis player. He was ranked world No. 8 in 1967.
Kenneth Norman Fletcher was an Australian tennis player who won numerous doubles and mixed doubles Grand Slam titles.
Jan Leschly is a Danish businessman and former professional tennis player. He was a semi finalist in the men's singles at the 1967 U.S. National Championships, and a quarter finalist in doubles at the1966 Wimbledon Championships. Between 1957 and 1973 he won 18 career titles in singles.
Marty Riessen is an American former amateur and professional tennis player active from the 1960s to the 1980s. He was ranked as high as No. 11 in the world in singles on the ATP rankings in September 1974, though was ranked as high as world No. 8 by Lance Tingay of The Daily Telegraph in 1971 before the computer rankings. Renowned for his doubles play, Riessen was also a regular doubles partner of Australian tennis great Margaret Court, winning six of his seven major mixed titles and a career Grand Slam alongside her. Additionally a winner of two men's doubles Grand Slams, his highest doubles ranking was No. 3 in March 1980.
Nicolas Pierre Armand Mahut is a French professional tennis player who is a former world No. 1 in doubles.
Wilhelm Paul Bungert is a former German tennis player best known for reaching the 1967 Wimbledon final. He participated in the 1970 Davis Cup final as a player and in the 1985 Davis Cup final as team captain.
Owen Keir Davidson was an Australian professional tennis player of the 1960s and 1970s.
Samuel Groth OLY, MP is an Australian politician and a former professional tennis player. Sitting as a member of the Victorian Legislative Assembly, Groth represents the Liberal Party in the seat of Nepean. He is also the Shadow Minister for Youth and Shadow Minister for Tourism, Sport and Events since December 2022.
John Edward Barrett, is a former tennis player, television commentator and author. He was born in Mill Hill, North West London, the son of Alfred Edward Barrett, a leaf tobacco merchant, and Margaret Helen Barrett. He had one sister, Irene Margaret Leppington (1925–2009), a research chemist. His father had the rare distinction of having played both for Leicester Tigers RFC as a wing three-quarter and for Leicester Fosse FC as a wing half.
Mate Pavić is a Croatian professional tennis player who is a former world No. 1 in doubles.
The 2012 ATP World Tour is the global elite professional tennis circuit organized by the Association of Tennis Professionals (ATP) for the 2012 tennis season. The 2012 ATP World Tour calendar comprises the Grand Slam tournaments, the ATP World Tour Masters 1000, the ATP World Tour 500 series, the ATP World Tour 250 series, the ATP World Team Championship, the Davis Cup, the ATP World Tour Finals, and the tennis event at the London Summer Olympic Games. Also included in the 2012 calendar is the Hopman Cup, which is organized by the ITF and does not distribute ranking points.
Vladimir Viktorovich Korotkov is a retired Soviet tennis player who won three Junior Grand Slam tournaments, Wimbledon Juniors in 1964, 1965 and French Juniors in 1965. He also won the mixed doubles at the 1968 Summer Olympics where tennis was a "demonstration sport". He won the men's doubles event at the 1973 Summer Universiade and the 1977 USSR singles championship. Since 1981 and until his retirement in 1996, Korotkov was coaching at several sports clubs.
Australia 
Italy (1968-1975)