The Association of Tennis Professionals (ATP) is the governing body of the men's professional tennis circuits – the ATP Tour, the ATP Challenger Tour and the ATP Champions Tour. It was formed in September 1972 by Donald Dell, Jack Kramer, and Cliff Drysdale to protect the interests of professional tennis players, and Drysdale became the first president. Since 1990 the association has organized the ATP Tour, the worldwide tennis tour for men and linked the title of the tour with the organization's name. It is the governing body of men's professional tennis. In 1990 the organization was called the ATP Tour, which was renamed in 2001 as just ATP and the tour being called ATP Tour. In 2009 the name of the tour was changed again and was known as the ATP World Tour, but changed again to the ATP Tour by 2019. It is an evolution of the tour competitions previously known as Grand Prix tennis tournaments and World Championship Tennis (WCT). The ATP's global headquarters are in London. ATP Americas is based in Ponte Vedra Beach, Florida; ATP Europe is headquartered in Monaco; and ATP International, which covers Africa, Asia and Australasia, is based in Sydney, Australia.
The ATP Finals is the season-ending championship of the ATP Tour. It is the most significant tennis event in the men's annual calendar after the four majors, as it features the top eight singles players and top eight doubles teams based on their results throughout the season. The eighth spot is reserved, if needed, for a player or team who won a major in the current year and is ranked from ninth to twentieth.
The Queen's Club Championships is an annual tournament for men's tennis, held on grass courts at the Queen's Club in West Kensington, London. The event is part of the ATP Tour 500 series on the Association of Tennis Professionals (ATP) Tour. It is currently advertised as the "cinch Championships" after its title sponsor.
The Qatar Open, currently known as the Qatar ExxonMobil Open for sponsorship reasons, is a professional tennis tournament played on outdoor hard courts. It is currently part of the ATP Tour 250 series of the Association of Tennis Professionals (ATP) Tour. It is held annually in January at the Khalifa International Tennis and Squash Complex in Doha, Qatar, since 1993. From 2025, this tournament will be upgraded to an ATP 500 level event.
The Indian Wells Open is an annual professional tennis tournament held in Indian Wells, California, United States. It is played on outdoor hardcourts at the Indian Wells Tennis Garden, and is held in March. The tournament is part of the ATP Masters 1000 events on the ATP Tour and part of the WTA 1000 events on the WTA Tour.
The Miami Open is an annual professional tennis tournament held in Miami Gardens, Florida, United States. It is played on outdoor hard courts at the Hard Rock Stadium, and is held in late March and early April. The tournament is part of the ATP Masters 1000 events on the ATP Tour and part of the WTA 1000 events on the WTA Tour.
The Cincinnati Open is an annual professional tennis event held in Cincinnati, United States. It is played on outdoor hard courts at the Lindner Family Tennis Center in Mason, Ohio, and is held in August. The event started on September 18, 1899, and is the oldest tennis tournament in the United States still played in its original city. It also is the third largest tennis event in the United States, after the US Open and the Indian Wells Masters. It is one of the ATP Masters 1000 tournaments on the ATP Tour, and one of the WTA 1000 tournaments on the WTA Tour.
The Connecticut Open was a professional tennis tournament played on outdoor hard courts under various names and in various venues from 1948 until 2019.
The Halle Open is a men's tennis tournament held in Halle, North Rhine-Westphalia, Germany. Held since 1993, the event is played on four outdoor grass courts and is a part of the ATP Tour 500 series on the ATP Tour schedule.
The Bavarian International Tennis Championships is a men's tennis tournament held at the MTTC Iphitos in Munich, Germany. Founded in 1899 as a combined men's and women's event. and previously known as the Bavarian Open the tournament is played on outdoor clay courts and is a part of the ATP Tour schedule.
The ATP Masters events, known as ATP Masters 1000 tournaments since 2009, are an annual series of nine tennis tournaments featuring the top-ranked players on the ATP Tour since its inception in 1990. The Masters tournaments, sitting below the Grand Slam tournaments and the year-end championships, make up the most coveted trophies on the annual ATP Tour calendar. In addition to the quadrennial Summer Olympics, they are collectively known as the 'Big Titles'.
Harri Heliövaara is a Finnish professional tennis player. His highest ranking in doubles is world No. 7, achieved on 12 June 2023 and in singles is World No. 194, achieved on 19 December 2011.
Diego Sebastián Schwartzman is an Argentine professional tennis player. He has won four ATP singles titles and reached his career-high singles ranking of world No. 8 in October 2020. As a clay court specialist, his best results have been on this surface. He is noted for his high-quality return game.
Marcos Andres Giron is an American professional tennis player. He achieved a career-high singles ranking of No. 44 on 19 February 2024 and a doubles ranking of No. 194 on 1 August 2022. He won the boys' singles in the Ojai Tennis Tournament in 2009 and the men’s invitational in 2011. In 2014, Giron won the singles title at the 2014 NCAA Division I Tennis Championships for UCLA.
Taylor Harry Fritz is an American professional tennis player. He has a career-high singles ranking of world No. 5 by the Association of Tennis Professionals (ATP), achieved on February 27, 2023, and a doubles ranking of world No. 104, achieved on July 26, 2021. Fritz has won seven ATP Tour singles titles, including a Masters 1000 title at the 2022 Indian Wells Masters. His best results at the majors are reaching the quarterfinals of the 2022 Wimbledon Championships, the 2023 US Open and the 2024 Australian Open.
Jeffrey John "J. J." Wolf is an American professional tennis player. He achieved a career-high ATP singles ranking of world No. 39 on 13 February 2023. Wolf played collegiately at Ohio State University.
Jenson Tyler "J. T." Brooksby is an American inactive professional tennis player. He reached a career-high singles ranking of world No. 33 on 13 June 2022.
Tennis was first played in the United States in 1874. In 1881, the National Lawn Tennis Association was founded in order to organize all tennis activities in the country. The first major tennis tournament was called the US Open Championship and was also first played in 1881.
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.
Tommy Paul 
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