The 2006 ATP Tour was the global elite men's professional tennis circuit organised by the Association of Tennis Professionals (ATP) for the 2006 tennis season. The ATP Tour is the elite tour for professional tennis organized by the Association of Tennis Professionals. The ATP Tour includes the four Grand Slam tournaments, the Tennis Masters Cup, the ATP Masters Series, the International Series Gold and the International Series tournaments.
Víctor Estrella Burgos is a Dominican former professional tennis player. In 2014, Estrella became the first Dominican to reach the top 100 in the ATP rankings. He also became the first Dominican player to reach the semifinals in an ATP 250 tournament in Bogotá. In 2015, he also became the first tennis player from his country to participate in all four Grand Slams, playing in the Australian Open. In February 2015, he won his first career ATP title at the Ecuador Open, becoming the oldest first-time ATP tour winner in the Open Era. He successfully defended his title with a 100% winning record at the event in 2016 and 2017, but lost in the second round in 2018.
Nikola Mektić is a Croatian professional tennis player who is a former world No. 1 in doubles.
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.
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.
Vijay SP Natarajan is an Indian professional tennis player. He has a career-high ATP doubles ranking of No. 80 achieved on 29 January 2024. He also has a career-high ATP singles ranking of No. 335 achieved on 5 October 2015.
Marc David Polmans is a South African-born Australian professional tennis player. Polmans has a career high ATP singles ranking of World No. 116 achieved on 12 October 2020. He also has a career high ATP doubles ranking of World No. 68 achieved on 16 October 2017. He won the 2015 Australian Open boys' doubles title with fellow Australian Jake Delaney, defeating Hubert Hurkacz and Alex Molčan in the final. He reached the semifinal of the 2017 Australian Open doubles with Andrew Whittington.
Rémi Boutillier is a French tennis player.
Andrea Collarini is an Argentine-American tennis player. who competes mainly on the ATP Challenger Tour. He has a career high ATP singles ranking of No. 177 achieved on 24 April 2023. He also has a career high ATP doubles ranking of No. 193 achieved on 1 August 2022. He has won three ATP Challenger and 15 ITF singles titles, and two Challenger and 10 ITF doubles titles.
The 2018 ATP World Tour was the global elite men's professional tennis circuit organised by the Association of Tennis Professionals (ATP) for the 2018 tennis season. The 2018 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 2018 calendar are the Hopman Cup and the Next Gen ATP Finals, which do not distribute ranking points.
Hans Hach Verdugo is a Mexican tennis player.
David Pérez Sanz is a Spanish tennis player.
Joris De Loore is a Belgian tennis player. De Loore has a career high ATP singles ranking of No. 142 achieved on 6 November 2023. He also has a career high ATP doubles ranking of No. 263, achieved on 24 December 2018. De Loore has won one Challenger, eleven ITF singles titles and one Challenger, fourteen ITF doubles titles. He competes mainly on the ATP Challenger Tour.
David Pel is a Dutch tennis player who specializes in doubles. He has a career high ATP doubles ranking of World No. 70 achieved on 2 October 2023. He also has a career high ATP singles ranking of No. 885 achieved on 1 May 2017. He has won one doubles ATP title with Sander Arends.
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.
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 Masters 1000, the ATP Cup, the ATP 500 series and the ATP 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.
Nicholas David Ionel is a Romanian professional tennis player. He has a career high ATP singles ranking of No. 184 achieved on 12 June 2023. He also has a career high ATP doubles ranking of No. 356 achieved on 24 April 2023. He is currently the No. 2 Romanian player.
Leandro Riedi is a Swiss professional tennis player. He has a career-high ATP singles ranking of world No. 117 achieved on 5 August 2024. He also has a career-high ATP doubles ranking of No. 211 achieved on 6 February 2023. He is currently the No. 2 Swiss player.
Tristan Schoolkate is an Australian professional tennis player. He has a career high ATP singles ranking of world No. 167 achieved on 9 September 2024 and a doubles ranking of No. 139 achieved on 6 May 2024.
The 2022 ATP Tour was the global elite men's professional tennis circuit organised by the Association of Tennis Professionals (ATP) for the 2022 tennis season. The 2022 ATP Tour calendar comprised the Grand Slam tournaments, the ATP Finals, the ATP Tour Masters 1000, the ATP Cup, the ATP 500 series and the ATP 250 series. Also included in the 2022 calendar were the Davis Cup, Wimbledon, the Next Gen ATP Finals, and Laver Cup, none of which distributed ranking points. As part of international sports' reaction to the Russian invasion of Ukraine, the ATP, the WTA, the ITF, and the four Grand Slam tournaments jointly announced on 1 March that players from Belarus and Russia would not be allowed to play in tournaments under the names or flags of their countries, but would remain eligible to play events until further notice. On 20 May 2022, the ATP, ITF, and WTA announced that ranking points would not be awarded for Wimbledon, due to the All England Club's decision to prohibit players from Belarus or Russia from participating in the tournament.
Poland 
