2021 Challenger de Buenos Aires

The 2021 Dove Men + Care Legión Sudamericana Challenger de Buenos Aires was a professional tennis tournament played on clay courts. It was the tenth edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Buenos Aires, Argentina between 18 and 24 October 2021.

Singles main-draw entrants

Seeds

¹ Rankings are as of 4 October 2021.

Other entrants

The following players received wildcards into the singles main draw:

The following players received entry from the qualifying draw:

Champions

Singles

Sebastián Báez def. Thiago Monteiro 6–4, 6–0.

Doubles

Luciano Darderi / Juan Bautista Torres def. Hernán Casanova / Santiago Rodríguez Taverna 7–6, 7–6.