Nicolás Alejandro MassúFried,nicknamed El Vampiro,is a Chilean former professional tennis player. A former world No. 9 in singles,he won the singles and doubles gold medals at the 2004 Athens Olympics. He is the only man to have won both gold medals at the same Games since the re-introduction of Olympic tennis in 1988,and they are Chile's only two Olympic gold medals. Massúalso reached the final of the 2003 Madrid Masters and won six singles titles. He was the coach of 2020 US Open champion and former world No. 3 Dominic Thiem from 2019 to 2023.
Jarkko Kalervo Nieminen is a Finnish former professional tennis player. His highest ranking of world No. 13,achieved in July 2006,is a Finnish record. He has won two ATP singles titles and five doubles titles in his career. His best performances in Grand Slam tournaments have been reaching the quarterfinals of the 2005 US Open,the 2006 Wimbledon Championships,and the 2008 Australian Open.
Nicolás Alexander Lapentti Gómez is a former professional tennis player from Ecuador. His brothers,Giovanni and Leonardo,uncle Andrés,and cousins Roberto and Emilio also are or were on the pro circuit. His father,also named Nicolás Lapentti,was a star basketball player at the College of St. Thomas in Minnesota from 1963 to 1967,and played on the Ecuador Olympic team.
Marcos Ondruska is a former tennis player from South Africa,who turned professional in 1989. He represented his native country at the 1996 Summer Olympics in Atlanta,Georgia,where he defeated Goran Ivaniševićin the first round before falling to Norway's Christian Ruud. The right-hander won four career titles in doubles,and reached his highest singles ATP-ranking on 10 May 1993,when he became the number 27 of the world and reached the semi-finals at the Miami Open.
Andrei Stanislavovich Olhovskiy is a former tennis player from Russia,who turned professional in 1989.
Leonardo Lavalle Moreno is a former tennis player from Mexico,who turned professional in 1985. He represented his native country at the 1992 Summer Olympics in Barcelona,where he was defeated in the quarterfinals by Spain's eventual runner up Jordi Arrese. The left-hander won one career title in singles. He reached his highest singles ATP-ranking on 17 March 1986,when he became world No. 51.
Alex O'Brien is an American former doubles world No. 1 tennis player. He gained the top ranking in May 2000 and was ranked as high as world No. 30 in singles in June 1997.
Oliver Marach is a former Austrian professional tennis player who primarily specialised in doubles.
The Association of Tennis Professionals (ATP) Tour is the elite professional tennis circuit organised by the ATP tour. The 2000 ATP Tour calendar comprises the Grand Slam tournaments,the tennis event at the 2000 Summer Olympics,the Tennis Masters Series,the ATP International Series Gold,the ATP International Series,the ATP World Team Cup,the Tennis Masters Cup and the ATP Tour World Doubles Championships. Also included in the 2000 calendar are the Davis Cup and the Hopman Cup,which do not distribute ranking points,and are both organised by the ITF.
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.
Guido Pella is an Argentine former professional tennis player. In August 2019,Pella reached his career best world No. 20 in singles. In July 2019,he peaked at No. 55 in doubles.
The 2016 ATP World Tour was the global elite professional tennis circuit organized by the Association of Tennis Professionals (ATP) for the 2016 tennis season. The 2016 ATP World Tour calendar comprised the Grand Slam tournaments,the ATP World Tour Masters 1000s,the ATP World Tour 500 series,the ATP World Tour 250 series,the Davis Cup,and the ATP World Tour Finals. Also included in the 2016 calendar were the tennis events at the 2016 Summer Olympics and Hopman Cup,neither of which distributed ranking points.
The 2017 ATP World Tour was the global elite men's professional tennis circuit organized by the Association of Tennis Professionals (ATP) for the 2017 tennis season. The 2017 ATP World Tour calendar comprised the Grand Slam tournaments,the ATP World Tour Masters 1000,the ATP Finals,the ATP World Tour 500 series,the ATP World Tour 250 series and the Davis Cup. Also included in the 2017 calendar are the Hopman Cup and the Next Gen ATP Finals,which do not distribute ranking points.
J. Francisco Guzmán Carmigniani,known as Pancho Guzmán,is an Ecuadorian former tennis player active in the 1960s and 1970s.
Alexander Merino is a Peruvian tennis player.
Diego Hidalgo is an Ecuadorian tennis player.
The 2019 ATP Tour was the global elite men's professional tennis circuit organised by the Association of Tennis Professionals (ATP) for the 2019 tennis season. The 2019 ATP Tour calendar comprised the Grand Slam tournaments,the ATP Tour Masters 1000,the ATP Finals,the ATP Tour 500 series,the ATP Tour 250 series and Davis Cup. Also included in the 2019 calendar were the Hopman Cup,the Laver Cup and the Next Gen ATP Finals which do not distribute ranking points. For the Masters series events the ATP introduced a shot clock. Players had a minute to come on court,5 minutes to warmup,and then a minute to commence play,as well as 25 seconds between points.
Leonardo Campana Romero is an Ecuadorian professional footballer who plays as a forward for Major League Soccer club Inter Miami and the Ecuador national team.
The 2021 ATP Tour was the global elite men's professional tennis circuit organised by the Association of Tennis Professionals (ATP) for the 2021 tennis season. The 2021 ATP Tour calendar comprised the Grand Slam tournaments,the ATP Finals,the ATP Tour Masters 1000,the ATP Cup,the ATP Tour 500 series and the ATP Tour 250 series. Also included in the 2021 calendar were the Davis Cup,the Summer Olympics in Tokyo,Next Gen ATP Finals,Laver Cup,none of which distributed ranking points.
María Dolores Campana is an Ecuadorian former professional tennis player.
Ecuador 
