2019 Challenger de Buenos Aires

The 2019 Challenger de Buenos Aires was a professional tennis tournament played on clay courts. It was the ninth edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Buenos Aires, Argentina between 23 and 29 September 2019.

Seeds

 * 1 Rankings are as of September 16, 2019.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇦🇷 Sebastián Báez
 * 🇦🇷 Román Andrés Burruchaga
 * 🇦🇷 Juan Manuel Cerúndolo
 * 🇦🇷 Facundo Díaz Acosta
 * 🇦🇷 Thiago Agustín Tirante

The following player received entry into the singles main draw as an alternate:
 * 🇧🇷 Rafael Matos

The following players received entry from the qualifying draw:
 * 🇦🇷 Tomás Farjat
 * 🇧🇴 Federico Zeballos

Singles

 * 🇮🇳 Sumit Nagal def. 🇦🇷 Facundo Bagnis 6–4, 6–2.

Doubles

 * 🇦🇷 Guido Andreozzi / 🇦🇷 Andrés Molteni def. 🇧🇴 Hugo Dellien / 🇧🇴 Federico Zeballos 6–7(3–7), 6–2, [10–1].