João Pedro Coelho Marinho de Sousa, known as João Sousa, is a Portuguese professional tennis player. He achieved a career-high ATP singles ranking of No. 28 on 16 May 2016 and a doubles ranking of No. 26 on 13 May 2019. Continuously ranked in the world's top-100 between July 2013 and March 2021, and with four ATP Tour singles titles, Sousa is often regarded as the best Portuguese tennis player of all time. He is nicknamed Conquistador for sharing his birthplace of Guimarães with Afonso I, the country's first king. Sousa is coached by former player Frederico Marques and practices at the BTT Tennis Academy in Barcelona.Sousa began playing tennis at the age of seven. After winning national youth titles, he decided at the age of fifteen to invest in his career by moving to Barcelona. After an unimpressive junior career, Sousa turned professional in 2008 and won his first singles tournament in 2009. He started playing in the ATP Challenger Tour in 2008, winning his first tournament at this level in 2011. Sousa debuted in the top-level ATP World Tour in 2008, and rose to prominence at the 2013 Malaysian Open, where he became the first Portuguese player to win a World Tour-level singles tournament.Sousa holds several Portuguese men's tennis records. In October 2013, he ranked 49th in the world after his victory at the Malaysian Open, becoming the first Portuguese player to break into the singles top 50. In November 2015, Sousa reached a career-high and Portuguese-best ranking of World No. 33, following his second ATP World Tour singles title at the Valencia Open. In May 2016, he improved his personal ranking best, becoming the first Portuguese player to enter the top 30 at World No. 28, as a result of reaching his first Masters 1000 quarter-finals in Madrid. In 2014, he was the first Portuguese player to compete exclusively at the ATP World Tour in a single season; the first to be seeded in a Grand Slam tournament ; and the second to reach the quarterfinals in a Grand Slam event. Sousa is the fourth Portuguese player to reach the singles top 100, and the second to do so in both singles and doubles rankings, after Nuno Marques. He is also the Portuguese player with the largest career prize money, and the most wins at Grand Slam singles tournaments.
Nicolás Jarry Fillol is a Chilean professional tennis player. He achieved his highest ATP singles ranking of world No. 18 on 8 January 2024 and is the current Chilean and Latin American No. 1. His highest doubles ranking of world No. 40 was achieved in March 2019. He has won three ATP Tour titles in singles, at Båstad 2019, Santiago 2023 and Geneva 2023. He also has won two ATP titles in doubles.
Elias Ymer is a Swedish tennis player. He has a career high ATP singles ranking of World No. 105, achieved on 11 June 2018. He has a career high ATP doubles ranking of World No. 188, achieved on 16 October 2017. He is the No. 1 Swedish player.
Laslo Djere is a Serbian professional tennis player. On 10 June 2019, Djere reached his career-high singles ranking of world No. 27. On 22 March 2021, he reached his career-high at world No. 346 in the doubles rankings. He has won two ATP Tour singles titles, one an ATP 500 Series event in Rio in 2019, after which he made the break-through into top 30, and the inaugural Forte Village Sardegna Open in 2020, an ATP 250 event. Djere debuted on the ATP Tour at the 2013 PTT Thailand Open, where he was a wildcard. His first qualification attempt to play in the main draw at any Grand Slam was at the 2015 French Open, but his first successful attempt and main draw debut happened at the 2016 French Open. At 2018 US Open, he recorded his first Grand Slam win, defeating Leonardo Mayer in first round.
Roman Rishatovich Safiullin is a Russian professional tennis player. Safiullin has a career high ATP singles ranking of world No. 36 achieved on 8 January 2024, and in doubles of world No. 239 achieved on 7 February 2022.
Hubert Hurkacz is a Polish professional tennis player. He has been ranked as high as world No. 9 in singles by the Association of Tennis Professionals (ATP), which he first achieved in November 2021, making him the highest-ranked Polish man in singles history. He has won seven ATP Tour singles titles, including two Masters 1000 titles at the 2021 Miami Open and the 2023 Shanghai Masters, becoming the first Pole to win an ATP Masters 1000 title. Hurkacz also has a career-high ranking of world No. 30 in doubles, which he attained in June 2022.
Daniel Elahi Galán Riveros is a Colombian professional tennis player. He reached a career-high ATP singles ranking of No. 56 on 17 July 2023. He also has a career-high doubles ranking of No. 305 achieved on 26 February 2018. He is currently the No. 1 Colombian tennis player. His best result at a Major is a fourth-round appearance at the 2023 Wimbledon Championships.
Casper Ruud is a Norwegian professional tennis player. Ruud has a career-high singles ranking of world No. 2, achieved on 12 September 2022, making him the highest-ranked Norwegian in history. He has won ten ATP Tour singles titles and finished runner-up at three majors and at the 2022 ATP Finals. As of December 19, 2023, he was ranked 11th in the world by the Association of Tennis Professionals (ATP).
Juan Pablo Varillas Patiño-Samudio is a Peruvian professional tennis player. Varillas has a career-high ATP singles ranking of No. 60 achieved on 26 June 2023. He is currently the No. 1 Peruvian tennis player.
Stefanos Tsitsipas is a Greek professional tennis player. He has been ranked as high as world No. 3 by the Association of Tennis Professionals (ATP), which he first achieved on 9 August 2021, making him the highest-ranked Greek player in history alongside Maria Sakkari.
Tallon Griekspoor is a Dutch professional tennis player. He has a career-high ATP singles ranking of world No. 21, achieved on 6 November 2023. He also has a career high ATP doubles ranking of World No. 86 achieved on 18 September 2023. Griekspoor is the current Dutch No. 1 men's singles player. He has won a record eight Challenger titles in one season (2021), and became also the first player in history to win five consecutive such titles.
Yannick Hanfmann is a German professional tennis player. He has a career-high ATP singles ranking of world No. 45, achieved in July 2023. He is known for his powerful serves and groundstrokes.
Matteo Berrettini is an Italian professional tennis player. He has been ranked as high as world No. 6 in singles by the Association of Tennis Professionals (ATP), which he achieved in January 2022, and world No. 105 in doubles, attained in July 2019. Berrettini has won seven ATP Tour singles titles and two doubles titles, and produced his best major performance by reaching the singles final of the 2021 Wimbledon Championships. He also became the first man born in the 1990s and first Italian man to reach the quarterfinals or better at all four majors after earning his first Australian Open semifinal in 2022.
Marc-Andrea Hüsler is a Swiss professional tennis player. He has a career-high singles ranking by the ATP of world No. 47, achieved on 13 February 2023. In doubles, he achieved a career-high ranking of world No. 132 on 25 October 2021. He is currently the No. 3 Swiss player.
Bernabé Zapata Miralles is a Spanish professional tennis player. He has been ranked by the Association of Tennis Professionals (ATP) as high as world No. 37 in singles, which he achieved in May 2023. He also has a career-high doubles ranking of world No. 404, attained in August 2023.
Jiří Lehečka is a Czech professional tennis player. Lehečka has a career high ATP singles ranking of world No. 29 achieved on 28 August 2023. He also has a career high ATP doubles ranking of No. 149 achieved on 11 September 2023. He is currently the No. 1 Czech player in men's singles. Lehečka has a career high ITF junior combined ranking of No. 10 achieved on 11 March 2019.
Dominic Stephan Stricker is a Swiss professional tennis player. He has a career high ATP singles ranking of No. 88 achieved on 2 October 2023. He also has a career high ATP doubles ranking of No. 161 achieved on 27 June 2022. He is currently the No. 2 Swiss player. On the junior tour, he had a career high junior ranking of No. 8, achieved on 3 February 2020.
Luca Nardi is an Italian professional tennis player.
Zizou Bergs is a Belgian professional tennis player. He has a career high ATP singles ranking of World No. 112 achieved on 6 February 2023. He also has a career high ATP doubles ranking of World No. 268 achieved on 13 November 2023. He is currently the No. 3 Belgian singles tennis player.
Luca Van Assche is a French professional tennis player.
Switzerland (2010–2018; 2022–present) 
United States (2018–2022)
