Per Stefan Mikael Simonsson is a former professional tennis player from Sweden. He enjoyed most of his tennis success while playing singles. During his career, he won 2 doubles titles. He achieved a career-high singles ranking of World No. 49 in 1983 and a career-high doubles ranking of World No. 88 in 1984. He is a brother of fellow tennis player Hans Simonsson. After his career, he coached two top 10 players on the ATP ranking, Magnus Gustafsson and Magnus Larsson.
Nikola Ćaćić is a Serbian professional tennis player. He has a career-high ranking of World No. 35 in doubles achieved on 8 November 2021. He has won three doubles titles in the ATP Tour, four doubles titles in the ATP Challenger Tour, as well as five singles and 32 doubles titles in ITF Futures tournaments.
Yasutaka Uchiyama is a Japanese tennis player playing on the ATP Challenger Tour. He achieved a career-high ATP singles ranking of world No. 78 on 04 November 2019 and doubles ranking of No. 102 on 20 August 2018.
Romain Arneodo is a French tennis player representing Monaco in competitions.
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 doubles titles with Uruguayan partner Ariel Behar. Escobar has a career high ATP singles ranking of No. 281 achieved on 15 June 2015.
Juan Pablo Varillas Patiño-Samudio is a Peruvian tennis player.
Nicolás Álvarez is a Peruvian tennis player.
Danilo Petrović is a Serbian tennis player.
Sander Gillé is a Belgian tennis player.
Altuğ Çelikbilek is a Turkish professional tennis player.
Daniel Cukierman is an Israeli tennis player.
Lauri Kiiski is a Finnish tennis player.
Marc-Andrea Hüsler is a Swiss tennis player. He has a career-high ATP singles ranking of world No. 104, achieved on 20 June 2022. In doubles, he achieved a career-high ranking of world No. 132 on 25 October 2021.
Alexander Donski is a Bulgarian tennis player.
Pedro Martínez Portero is a Spanish professional tennis player. During his junior career, he won the junior Davis Cup 2013. Martínez has a career high ATP singles ranking of World No. 40 achieved on 9 May 2022. He also has a career high ATP doubles ranking of World No. 53 achieved on 9 May 2022.
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.
Fredrik Waern is a former professional tennis player from Sweden.
Yuta Shimizu is a Japanese tennis player.
Conner Huertas del Pino is a Peruvian tennis player.
Dragoș Nicolae Mădăraș is a Romanian-born Swedish tennis player.
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