Filip Krajinović is a Serbian former professional tennis player. He achieved a career-high singles ranking of world No. 26 on 23 April 2018.
Damir Džumhur is a Bosnian professional tennis player. His career-best singles ranking of World No. 23 achieved on 2 July 2018, made him the highest-ranked tennis player from Bosnia and Herzegovina in history. He is currently Bosnia and Herzegovina's No. 1 player.
David Goffin is a Belgian professional tennis player. His career-high singles ranking is world No. 7, making him the highest ranked player from Belgium in tennis history. He is also the first and only Belgian man to be ranked in the top 10. He is currently the No. 1 Belgian player.
Ariel Behar is a Uruguayan professional tennis player who specializes in doubles. His career-high doubles ranking is World No. 34 achieved on 6 May 2024. He has won three ATP titles with Ecuadorian partner Gonzalo Escobar. He has taken part of the Uruguay Davis Cup team since 2009.
The 2013 ATP World Tour was the global elite professional tennis circuit organized by the Association of Tennis Professionals (ATP) for the 2013 tennis season. The 2013 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 Davis Cup and the ATP World Tour Finals. Also included in the 2013 calendar is the Hopman Cup, which was organized by the ITF and does not distribute ranking points.
Lucas Pouille is a French professional tennis player. He has a career-high ATP singles ranking of world No. 10, achieved on 19 March 2018 and a career-high ATP doubles ranking of world No. 79, achieved on 11 April 2016. He has won five singles titles on the ATP Tour and was on the winning French Davis Cup team in 2017.
Jordan Thompson is an Australian professional tennis player. He reached a career-high ranking of world No. 26 in singles and of No. 3 in doubles. He has won one singles and seven doubles ATP titles. He is currently the No. 3 Australian player in singles and No. 1 in doubles.
Taylor Harry Fritz is an American professional tennis player. He has a career-high singles ranking of world No. 4 by the ATP, achieved on November 18, 2024, and a doubles ranking of No. 104, achieved on July 26, 2021. Fritz has won eight ATP Tour singles titles, including a Masters 1000 title in Indian Wells. His best results are reaching the Grand Slam final at the 2024 US Open and the final of the 2024 ATP Finals. He is the No. 1 American singles player.
Gonzalo Escobar is an Ecuadorian tennis player. His career-high doubles ranking is World No. 38, achieved on 15 November 2021. He has won three ATP doubles titles with Uruguayan Ariel Behar and three with Kazakhstani Aleksandr Nedovyesov. Escobar also has a career high ATP singles ranking of No. 281 achieved on 15 June 2015.
Benjamin Lock is a Zimbabwean tennis player. He has a career high ATP singles ranking of world No. 311 achieved on 16 December 2024. He also has a career high ATP doubles ranking of No. 154 achieved on 14 October 2024.
Reilly Opelka is an American professional tennis player. At 6 feet 11 inches (2.11 m), he is tied for the tallest-ever ATP-ranked player, and can produce serves that measure over 140 miles per hour (225 km/h). He has been ranked as high as world No. 17 in singles by the ATP, which he achieved on February 28, 2022, and in doubles as world No. 89 on August 2, 2021. He has won four ATP singles titles and one doubles title. He won the junior Wimbledon championship in 2015.
Nick Hardt is a Dominican professional tennis player. He has a career high ATP singles ranking of world No. 180 achieved on 29 July 2024 and a doubles ranking of No. 282 achieved on 24 August 2023. He is currently the No. 1 Dominican player.
Prajnesh Gunneswaran is an Indian former professional tennis player. He has won 2 ATP Challenger and 8 ITF titles in singles and 1 ITF title in doubles. He represents India at the Davis Cup. At the 2018 Asian Games in Jakarta, he won the bronze medal in the men's singles event.
Hamad Medjedovic is a Serbian professional tennis player. On 16 October 2023, Medjedovic reached his career-high ATP singles ranking of world No. 102.
Coleman Wong Chak-lam is a tennis player from Hong Kong. He has a career high ATP singles ranking of No. 134 achieved on 23 September 2024 and a doubles ranking of No. 468 achieved on 9 September 2024. He is the highest-ranked male Hong Kong tennis player in history, having cracked the top 300 and later the top 150 in the rankings.
Matteo Arnaldi is an Italian professional tennis player. He has a career high ATP singles ranking of world No. 30, achieved on 12 August 2024, and a career high doubles ranking of world No. 286, achieved on 8 August 2022. He is currently the No. 3 Italian. Representing Italy, he was part of the Italian squad winning the 2023 Davis Cup and won the Gold Medal at the 2022 Mediterranean Games in men singles.
Henry Patten is a British professional tennis player who specialises in doubles. He has been ranked by the ATP as high as world No. 12 in doubles, achieved on 19 August 2024. Patten has won four career doubles titles on the ATP Tour, including one Grand Slam tournament title at the 2024 Wimbledon Championships, all alongside partner Harri Heliövaara. He also attained his career-high singles ranking of world No. 462 in September 2022.
Mark Lajal is an Estonian tennis player. He has a career high ATP singles ranking of world No. 191, achieved on 20 November 2023. He also has a career high ATP doubles ranking of No. 710, achieved on 9 September 2024. He is currently the No. 1 Estonian player.
Gabriel Diallo is a Canadian professional tennis player. He has a career-high ATP singles ranking of world No. 87, achieved on 21 October 2024 and a doubles ranking of No. 321 achieved on 8 January 2024.
Elmer Møller is a Danish tennis player. He has a career high ATP singles ranking of No. 152 achieved 25 November 2024 and a doubles ranking of No. 899 achieved on 26 June 2023. He is currently the No. 2 Danish player.
Lithuania 
