The 2007 ATP Buenos Aires was a professional men's tennis tournament that was played on outdoor clay courts at the Buenos Aires Lawn Tennis Club in Buenos Aires, Argentina. It was part of the International Series on the 2007 ATP Tour and was held from 19 February through 26 February 2007. Unseeded Juan Mónaco won the singles title.

This was the fourth tournament of the season (alongside Adelaide, Viña del Mar, Delray Beach and Las Vegas) that implemented a 24-player Round robin tournament for the singles competition, as part of the round-robin trials proposed during this season.

The following players received wildcards into the main draw:

The following players received entry from the qualifying draw:

The following players received entry as lucky losers:

The following pairs received wildcards into the main draw:

Juan Mónaco defeated Alessio di Mauro 6–1, 6–2

Martín García / Sebastián Prieto defeated Albert Montañés / Rubén Ramírez Hidalgo 6–4, 6–2