Eric Taino is a retired ATP Tour American tennis player, who later represented the Philippines in international competition.
Yuki Bhambri is an Indian professional tennis player who currently specializes in doubles. He has an ATP career-high doubles ranking of world No. 50 achieved on 24 June 2024. He also has a career-high singles ranking of No. 83 achieved on 16 April 2018.
Andrey Alexandrovich Kuznetsov is a Russian professional tennis player and coach. On 25 April 2016, he achieved his singles career-high of world No. 39.
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.
Sam Barry is an Irish professional tennis player. He was born and raised in Limerick, Ireland.
Dimitar Kuzmanov is a Bulgarian professional tennis player. He competes on the ATP Challenger Tour. His highest singles ranking is No. 159 achieved on 29 August 2022, whilst his best doubles ranking is No. 438 achieved on 1 April 2019.
Leander Adrian Paes is an Indian former professional tennis player. He is regarded as one of the greatest doubles tennis players of all-time and holds the record for the most doubles wins in the Davis Cup. Paes won eight men's doubles and ten mixed doubles Grand Slam titles. He made a total of 34 Grand Slam finals across men's and mixed doubles in his career which is the joint 2nd highest of all-time among men. He holds a career Grand Slam in men's doubles and mixed doubles making him one of only three men in the Open era to achieve this distinction and won the rare men's/mixed double at the 1999 Wimbledon Championships. Paes, together with Mahesh Bhupathi, were the first pair in Open era history to reach the men's doubles finals of all 4 Grand Slams in the same calendar year (1999).
Nikola Milojević is a Serbian professional tennis player. Milojević has a career high ATP singles ranking of No. 125, which he achieved on 21 February 2022. He also achieved a career high ATP doubles ranking of No. 252 on 18 February 2019. He reached his highest ranking of no. 1 in ITF Junior rankings on 7 January 2013.
Quentin Halys is a French professional tennis player. Halys has a career-high ATP singles ranking of world No. 61 achieved on 16 January 2023 and a doubles ranking of No. 129 achieved on 3 October 2022. He has won seven singles titles on the ATP Challenger Tour and seven in doubles.
Sriram Balaji is an Indian professional tennis player. He has a career high ATP doubles ranking of world No. 67, achieved on 10 June 2024 and a singles ranking of world No. 287, achieved on 19 June 2017.
Miomir Kecmanović is a Serbian professional tennis player. Kecmanović reached his best singles ranking of world No. 27 on 16 January 2023 and he peaked at world No. 135 on 10 April 2023 in the doubles rankings. He has won one singles and one doubles ATP titles, as well as two Challenger titles in his career. He is currently the No. 4 Serbian player.
Hsu Yu-hsiou is a Taiwanese tennis player. He has a career high ATP singles ranking of world No. 158 achieved on 16 October 2023. He also has a career high ATP doubles ranking of world No. 149 achieved on 11 July 2022. Hsu is currently the No. 2 Taiwanese player on the ATP tour.
An Jae-sung is a retired South Korean tennis player.
Jiří Lehečka is a Czech professional tennis player. Lehečka has a career high ATP singles ranking of world No. 23 achieved on 15 January 2024. He also has a career high ATP doubles ranking of No. 144 achieved on 15 January 2024. He is currently the No. 1 Czech player in singles. Lehečka has a career high ITF junior combined ranking of No. 10 achieved on 11 March 2019.
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.
The 2020 Qatar Open was the 28th edition of the Qatar Open, a men's tennis tournament which is played on outdoor hard courts. It was part of the ATP Tour 250 of the 2020 ATP Tour. It took place at the Khalifa International Tennis and Squash Complex in Doha, Qatar from 6 to 11 January 2020. The tournament was awarded the Tournament of the Year award in the 250 category from the 2019 ATP Awards for the third time in five years. Second-seeded Andrey Rublev won the singles title.
Abedallah Shelbayh (Arabic: عبد الله شلبيه, romanized: eabd allah shalabih; (also known as Abdullah Shelbayh is a Jordanian tennis player.
Coleman Wong Chak-lam is a tennis player from Hong Kong. He has a career high ATP singles ranking of No. 170, achieved on 10 June 2024, and doubles ranking of No. 564, achieved on 18 September 2023. As the first-ever male Hong Kong tennis player to crack the top 300 and the top 200 in the ATP singles rankings, he is also the highest-ranked male Hong Kong tennis player in history.
Jakub Menšík is a Czech professional tennis player. He has a career-high ATP singles ranking of world No. 65 achieved on 6 May 2024 and a doubles ranking of No. 402 achieved on 12 June 2023. He is currently the No. 3 Czech in singles and the youngest player in the top 100.
Dino Prižmić is a Croatian professional tennis player. Prižmić has a career-high ATP singles ranking of No. 155 achieved on 23 October 2023. He also has a career-high ATP doubles ranking of No. 1444 achieved on 16 January 2023. He is currently the No. 4 Croatian player.
Qatar 
