Raúl Ramírez is a Mexican former professional tennis player. He was active during the 1970s and 1980s. Ramírez was the first player to finish first in both singles and doubles Grand Prix point standings, accomplishing the feat in 1976. He attended and played tennis at the University of Southern California in Los Angeles.
Pierre-Hugues Herbert is a French professional tennis player. In doubles, he has completed the Career Grand Slam with titles at the 2015 US Open, the 2016 Wimbledon Championships, the 2018 French Open, the 2021 French Open, and the 2019 Australian Open partnering Nicolas Mahut. His career-high doubles ranking is World No. 2 achieved on 11 July 2016. The pair have also claimed seven ATP Tour Masters 1000 titles and ATP Finals titles in 2019 and 2021. In singles, Herbert has reached four ATP career finals and achieved his career-high singles ranking of world No. 36 on 11 February 2019.
Kevin Krawietz is a German professional tennis player who specialises in doubles.
Harri Heliövaara is a Finnish professional tennis player. His highest ranking in singles is World No. 194, which he achieved on 19 December 2011. His highest ranking in doubles is world No. 7, which he achieved on 12 June 2023. He won his first Grand Slam at the 2023 US Open mixed doubles event. In doubles he has won four ATP Tour titles, his first alongside Lloyd Glasspool at the 2021 Open 13, 13 ATP Challenger tournaments, his first in 2011 in Tashkent, Uzbekistan. He has also won 20 ITF Futures in doubles and eight ITF Futures tournaments in singles. He won the 2007 Australian Open boys' doubles title with Graeme Dyce.
Fabrice Martin is a French professional tennis player. He reached a career-high ATP singles ranking of world No. 228 on 23 July 2012, and his highest ATP doubles ranking, world No. 19, on 24 April 2023.
Shane Barr is a former professional tennis player from Australia.
Tim Pütz is a German professional tennis player who specialises in doubles.
Hugo Nys is a Monegasque professional tennis player who previously represented France. A doubles specialist, he reached his highest ATP singles ranking of No. 327 on 29 July 2019, and his highest doubles ranking of No. 12 on 12 June 2023. He became the first ever Monegasque player to reach the semifinal and final of a Major at the 2023 Australian Open.
Romain Arneodo is a French-born Monegasque professional tennis player who specializes in doubles. From 2008 to 2013, Arneodo represented France in international competition, but has since represented Monaco. Arneodo has been ranked by the Association of Tennis Professionals (ATP) as high as world No. 50 in doubles, which he achieved in August 2023. He also has a career-high ATP singles ranking of world No. 455, attained in August 2014. Since turning professional, Arneodo has won one ATP doubles title as well as twelve doubles titles on the ATP Challenger Tour and one singles and 20 doubles titles on the ITF Men's World Tennis Tour.
Tucker Vorster is a South African tennis player.
Tim van Rijthoven is an inactive Dutch professional tennis player.
Tristan-Samuel Weissborn is an Austrian professional tennis player who specializes in doubles.
Lloyd Glasspool is a British professional tennis player who specialises in doubles. He has a career-high doubles ranking of No. 7 and a career-high singles ranking of No. 282. In his career, Glasspool has won four ATP and five ATP Challenger doubles titles and 16 Futures titles.
Arianne Hartono is a Dutch tennis player. In her career, Hartono has won three singles titles and eighteen doubles titles on the ITF Circuit. On 12 February 2024, she reached her best singles ranking of world No. 143, and on 11 July 2022, she peaked at No. 123 in the WTA doubles rankings.
Erling L'Orsa Tveit is a former tennis player from Norway.
Max Westphal is a French tennis player.
The 2023 ATP Tour was the global elite men's professional tennis circuit organised by the Association of Tennis Professionals (ATP) for the 2023 tennis season. The 2023 ATP Tour calendar comprised the Grand Slam tournaments, supervised by the International Tennis Federation (ITF), the ATP Finals, the ATP Tour Masters 1000, the United Cup, the ATP 500 series, the ATP 250 series. Also included in the 2023 calendar were the Davis Cup, Next Gen ATP Finals, Laver Cup, Hopman Cup, none of which distributed ranking points. 2023 marked the return of the ATP tournaments in China after strict COVID-19 protocols in the country.
The 2023 Bratislava Open was a professional tennis tournament played on clay courts. It was the 4th edition of the tournament which was part of the 2023 ATP Challenger Tour. It took place in Bratislava, Slovakia between 12 and 18 June 2023.
The 2023 Tennis Open Karlsruhe was a professional tennis tournament played on clay courts. It was the first edition of the tournament which was part of the 2023 ATP Challenger Tour. It took place in Karlsruhe, Germany between 3 and 9 July 2023.
The 2023 Svijany Open was a professional tennis tournament played on clay courts. It was the 10th edition of the tournament which was part of the 2023 ATP Challenger Tour. It took place in Liberec, Czech Republic between 31 July and 6 August 2023.
Germany 
