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 Hamburg Open is an annual tennis tournament for professional players held in Hamburg, Germany and part of the Association of Tennis Professionals (ATP) Tour. It is the 5th oldest tennis tournament in the world.
The Romanian Open is a professional men's tennis tournament played on outdoor clay courts. It was the successor event to the earlier Romanian International Championships (1930–1983). It is part of the ATP 250 tournaments of the ATP Tour. It was held annually in Bucharest, Romania, between 1993 and 2016 and revived in 2024. Its name is taken from Romania's famous tennis players Ilie Năstase and Ion Țiriac.
The Korea Open is a professional tennis tennis tournament held in Seoul, South Korea. The women's edition started in 2004 as a WTA International tournament and was played at the Seoul Olympic Park Tennis Center on outdoor hardcourts. In 2012 and 2013, it was sponsored by Korea Development Bank. In 2014, Kia Motors was the sponsor.
The Argentina Open or Abierto Argentino is an annual tennis event for male tennis players held in Buenos Aires, Argentina. The tournament was established in 1927 as the Argentina International Championships and was a combined men's and women's event from 1928 until 1987 when the women's tournament was discontinued. The men's tournament is an ATP Tour 250 event on the ATP Tour, and is played on outdoor clay courts at the 5,500 capacity Buenos Aires Lawn Tennis Club, in the Palermo barrio (neighbourhood). Usually held in February, it includes both a men's singles and a men's doubles tournament. Between 1970 and 1989 it was part of the Grand Prix tennis circuit and a Grand Prix Super Series event (1970–71).
Marcelo Pinheiro Davi de Melo is a Brazilian professional tennis player who is a doubles specialist. He is a former world No. 1, which he achieved in November 2015. Melo is the only Brazilian playerwho has reached number one in the ATP doubles rankings.
The Hong Kong Open is a professional tennis tournament organized by the Hong Kong, China Tennis Association annually at the Victoria Park Tennis Centre in Causeway Bay, Hong Kong.
The Serbia Open was a professional tennis tournament, part of the ATP 250 series and the ATP Tour. Held in Belgrade, Serbia and played on outdoor clay courts, the event was held for the first time in 2009. It was the first for Serbia, as the country had never before hosted an Association of Tennis Professionals tournament. The tournament was held as a combined men's and women's event in 2021. This marked the first time in history a WTA tournament was held in Serbia. The last edition was played in 2022, after which the tournament moved for a one-year period to Banja Luka, Bosnia and Herzegovina and rebranded as Srpska Open.
Marcelo Fedrizzi Demoliner is a Brazilian professional tennis player, who specializes in doubles. He reached a career-high doubles ranking of world No. 34 in November 2017. Demoliner has won five doubles titles.
Andrej Martin is a Slovak professional tennis player. He achieved his career-high ATP singles ranking of world No. 93 in February 2020 and a doubles ranking of world No. 69 on 11 July 2016.
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'.
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, and five singles and 32 doubles titles in ITF Futures tournaments.
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.
Taro Daniel is a Japanese professional tennis player. He achieved a career-high singles ranking of world No. 58 on 15 January 2024. He has won one ATP Tour singles title at the 2018 Istanbul Open, as well as eight ATP Challenger Tour singles titles. He is currently the No. 2 Japanese player in men's singles.
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.
Alex Molčan is a Slovak professional tennis player. Molčan has a career-high ATP singles ranking of World No. 38 achieved on 23 May 2022. He also has a career high ATP doubles ranking of No. 268 achieved on 14 June 2021. He is currently the No. 4 Slovak tennis player.
The 2021 Serbia Open was a tennis tournament played on outdoor clay courts. It was the 5th and 1st edition of the event for male and female professional tennis players, respectively. It was part of the 2021 ATP Tour and the 2021 WTA Tour and took place in Belgrade, Serbia; in mid-April for men and mid-May for women. A second ATP tournament, called the Belgrade Open, was played in men's singles the week before the French Open.
Marko Topo is a German tennis player.
The Gijón Open is an ATP 250 event currently held in November. The tournament was first held in October 2022 on a single-year license. The tournament was set to return in 2024, but was unexpectedly moved to Belgrade in August.
The 2024 Belgrade Open is a men's tennis tournament to be played on indoor hard courts. It will be the 2nd edition of the event, and part of the ATP 250 tournaments on the 2024 ATP Tour. It will take place at the Belgrade Arena from 3 November to 9 November 2024. The tournament was organized as a replacement for the Gijón Open, which had to be relocated due to operational reasons.
2024 Belgrade Open 
Novak Djokovic 
Jonathan Erlich / 
Andrei Vasilevski 
