|2020 Argentina Open|
|Location||Buenos Aires, Argentina|
|Venue||Buenos Aires Lawn Tennis Club|
|Category||ATP World Tour 250|
|Surface||Clay - outdoors|
|Draw||28S / 16Q / 16D|
|Prize money||US$568,190 (2019)|
|Current champions (2020)|
|Doubles|| Marcel Granollers|
The ATP Buenos Aires (Spanish: Abierto de Buenos Aires, pronounced [aˈβjeɾto ðe ˈβwenos ˈaiɾes]) originally known as the Argentine Championships and established in 1921  is an annual tennis event for male tennis players held in Buenos Aires, Argentina. The tournament is an ATP World Tour 250 series event on the ATP World 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).
The tournament is currently without sponsor, but presented by the City of Buenos Aires. Previously the event was known by different names such as Argentine Championships (1921-1967), South American International Championships (1968), South American Open (1969-1974), Copa AT&T and Copa Telmex.
- "ARGENTINE CH. Tournament Roll of Honour". thetennisbase.com. The Tennis Base. Retrieved 3 October 2017.