Campeonato Argentino Abierto de Polo
The Campeonato Argentino Abierto de Polo is an international polo championship at club level, organised every year since 1893 at the Campo Argentino de Polo of Palermo, Buenos Aires.
It was known as the "River Plate Polo Championship" between 1893-1923, and as well as the other two main polo events in Argentina, the handicap of the teams must be between 28 and 40 goals. It is organized by the Asociación Argentina de Polo.
In 1975, Coronel Suárez became the first team in history to play in the tournament with a maximum handicap of 40 goals.
The individual record holder with the most Argentine Open Polo Championship victories is Juan C. Harriott Jr. with 20 total championships.
The individual with the greatest length of time between their first victory and their latest victory is Adolfo Cambiaso with 31 years between his first and most recent championships. The individual with the second greatest length of such time is Enrique Alberdi with 23 years between his first championship and his last championship.
The youngest person to ever win the Argentine Open Polo Championship is Adolfo "Poroto" Cambiaso Jr.) who won it in 2022 at age 17 years and 6 days while playing for La Dolfina. The second youngest to ever win the Championship is Benjamin Araya who won it in 1980 at the age of 17 years, four months, and one day while playing for Coronel Suárez. The third youngest person to ever win the Championship was José E. Traill who won it in 1904 at the age of 17 years, four months, and eighteen days while playing for the North Santa Fe team.
The only non-Argentine team to ever win the Championship was the American team in 1932. A group of Americans came to Buenos Aires to play in the 1932 Championship with four of them forming the Meadow Brook team. The Meadow Brook team consisted of Mike Phipps, Winston Guest, Elmer Boeseke Jr., and Billy Post. They beat Santa Paula by a score of 8 to 7 in the 1932 final. Notable from that year was that the reserve Americans played for a number of the local Argentine teams. Seymour Knox played for La Pampa, Stewart B. Iglehart and Stephen Sanford played for Santa Inés, Jimmy Mills played for Venado Tuerto, and Pat Roark played for Los Pingüinos.
List of champions
The first championship was held in 1893, being won by Hurlingham. Below is the list of the champions.;'''Notes:'''
Multiple championship winners
| Player | Titles | First Title | Age at First Title | Most Recent Title |
| Juan C. Harriott Jr. | 20 | 1957 | 21 | 1979 |
| Adolfo Cambiaso | 19 | 1994 | 18 | 2025 |
| Horacio Heguy Sr. | 19 | 1958 | 22 | 1979 |
| Alberto Heguy Sr. | 17 | 1963 | 22 | 1981 |
| Alfredo Harriott | 13 | 1967 | 22 | 1981 |
| Pablo Mac Donough | 13 | 2008 | 26 | 2024 |
| Enrique Alberdi | 12 | 1934 | 24 | 1957 |
| Juan Martin Nero | 12 | 2008 | 27 | 2022 |
| Juan A. E. Traill | 11 | 1904 | 22 | 1923 |
| Mariano Aguerre | 9 | 1994 | 25 | 2012 |
| Juan Alberdi | 9 | 1934 | 1955 | |
| Gonzalo Pieres Sr. | 9 | 1984 | 28 | 1998 |
| Juan C. Harriott | 8 | 1952 | 40 | 1964 |
| David Stirling Jr | 9 | 2011 | 30 | 2020 |
| Bartolomé Castagnola | 7 | 1997 | 27 | 2009 |
| Juan Cavanagh | 7 | 1944 | 1955 | |
| Roberto Cavanagh | 7 | 1937 | 23 | 1955 |
| Luis Duggan | 7 | 1939 | 33 | 1951 |
| Daniel González | 7 | 1961 | 1983 | |
| Luis L. Lacey | 7 | 1915 | 28 | 1937 |
| Carlos Menditeguy | 7 | 1940 | 26 | 1960 |
| Hugo Scott Robson | 7 | 1893 | 34 | 1905 |
| Manuel Andrada | 6 | 1930 | 40 | 1939 |
| Horacio Heguy Jr. | 6 | 1986 | 22 | 2001 |
| Marcos Heguy | 6 | 1986 | 20 | 2001 |
| Juan D. Nelson | 6 | 1920 | 29 | 1937 |
| Alfonso Pieres | 6 | 1984 | 30 | 1990 |
| Ernesto Trotz Jr. | 6 | 1984 | 28 | 1990 |
| Francisco J. Balfour | 5 | 1893 | 1903 | |
| Heriberto Duggan | 5 | 1939 | 1943 | |
| Carlos Gracida | 5 | 1987 | 27 | 1994 |
| Bautista Heguy | 5 | 1991 | 20 | 2001 |
| Gonzalo Heguy | 5 | 1986 | 22 | 1995 |
| Facundo Pieres | 5 | 2008 | 22 | 2024 |
| Arturo Kenny | 5 | 1920 | 1929 | |
| Carlos Land | 5 | 1916 | 1924 | |
| Julio Menditeguy | 5 | 1940 | 1956 | |
| José E. Traill | 5 | 1904 | 17 | 1923 |
| Alberto Heguy Jr. | 4 | 1996 | 26 | 2004 |
| Eduardo Heguy | 4 | 1996 | 26 | 2004 |
| Ignacio Heguy | 4 | 1996 | 22 | 2004 |
| David Miles | 4 | 1916 | 1923 | |
| Juan Miles | 4 | 1916 | 21 | 1923 |
| Lucas Monteverde Jr. | 4 | 2005 | 28 | 2009 |
| Julio Negrón | 4 | 1918 | 1927 | |
| José Reynal | 4 | 1930 | 1936 | |
| Thomas Scott Robson | 4 | 1899 | 1905 | |
| Roberto Traill | 4 | 1906 | 1913 | |
| Camilo “Jeta” Castagnola | 4 | 2021 | 19 | 2025 |
| Bartolomé Castagnola Jr | 4 | 2021 | 21 | 2025 |
| Milo Fernández Araujo | 3 | 1999 | 33 | 2004 |
| Benjamín Araya | 3 | 1980 | 17 | 1983 |
| Francisco Dorignac | 3 | 1971 | 33 | 1982 |
| Gastón Dorignac | 3 | 1971 | 31 | 1982 |
| Frank Furber | 3 | 1893 | 1897 | |
| Arthur Follet Holt | 3 | 1894 | 29 | 1897 |
| Daniel Kearney | 3 | 1922 | 1928 | |
| Juan Kearney | 3 | 1922 | 1928 | |
| Francis E. Kinchant | 3 | 1895 | 1900 | |
| Guillermo Brooke Naylor | 3 | 1922 | 38 | 1928 |
| Gonzalo Pieres Jr. | 3 | 2008 | 25 | 2012 |
| Juan Reynal | 3 | 1930 | 1936 | |
| L. A. Lynch Staunton | 3 | 1911 | 1913 | |
| Eduardo Traill | 3 | 1898 | 1908 | |
| Adolfo "Poroto" Cambiaso Jr. | 2 | 2022 | 17 | 2025 |
;'''Notes:'''
Championship winners with greatest number of unique teammates
| Player | Unique Teammates | Teammate Change Ratio | Titles |
| Juan A. E. Traill | 15 | 1.36 | 11 |
| Enrique Alberdi | 15 | 1.25 | 12 |
| Adolfo Cambiaso | 13 | 0.68 | 19 |
| Mariano Aguerre | 11 | 1.22 | 9 |
| Juan C. Harriott Jr. | 9 | 0.45 | 20 |
| Juan Alberdi | 8 | 0.89 | 9 |
| Horacio Heguy Sr | 8 | 0.42 | 19 |
| Alberto Heguy | 7 | 0.41 | 17 |
;'''Notes:'''
Titles by club
| Team | Titles |
| Coronel Suárez | 25 |
| La Dolfina | 16 |
| Hurlingham | 15 |
| North Santa Fe | 8 |
| El Trébol | 8 |
| Venado Tuerto | 7 |
| La Espadaña | 6 |
| Indios Chapaleufú I | 6 |
| Ellerstina | 6 |
| Indios Chapaleufú II | 4 |
| The Casuals | 3 |
| Las Rosas | 3 |
| Santa Inés | 3 |
| Santa Paula | 3 |
| Santa Ana | 3 |
| La Natividad | 2 |
| Las Petacas | 2 |
| Western Camps | 2 |
| Flores | 1 |
| La Victoria | 1 |
| San Carlos | 1 |
| Palomar | 1 |
| La Rinconada | 1 |
| Meadow Brook | 1 |
| Tortugas | 1 |
| Los Indios | 1 |
| Los Pingüinos | 1 |
| Coronel Suárez II | 1 |
| La Aguada | 1 |