| 2019 Challenger de Buenos Aires | |
|---|---|
| Date | 23–29 September |
| Edition | 9th |
| Surface | Clay |
| Location | Buenos Aires, Argentina |
| Champions | |
| Singles | |
 Sumit Nagal | |
| Doubles | |
 Guido Andreozzi / Andrés Molteni | |
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.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| ARG | Federico Delbonis | 71 | 1 |
 BOL | Hugo Dellien | 83 | 2 |
| ARG | Leonardo Mayer | 99 | 3 |
 BRA | Thiago Monteiro | 103 | 4 |
| ARG | Guido Andreozzi | 113 | 5 |
| ARG | Federico Coria | 153 | 6 |
| IND | Sumit Nagal | 159 | 7 |
| ARG | Facundo Bagnis | 164 | 8 |
| ARG | Facundo Mena | 195 | 9 |
| BRA | João Menezes | 202 | 10 |
| ARG | Andrea Collarini | 219 | 11 |
 DOM | José Hernández-Fernández | 260 | 12 |
| ARG | Francisco Cerúndolo | 263 | 13 |
| ARG | Renzo Olivo | 267 | 14 |
| ARG | Matías Franco Descotte | 296 | 15 |
| BRA | Thiago Seyboth Wild | 334 | 16 |
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:
The following players received entry from the qualifying draw:
Tomás Farjat Federico Zeballos Sumit Nagal def. Facundo Bagnis 6–4, 6–2. Guido Andreozzi / Andrés Molteni def. Hugo Dellien / Federico Zeballos 6–7(3–7), 6–2, [10–1].The 2009 Copa Petrobras Buenos Aires was a professional tennis tournament played on outdoor clay courts. It was part of the 2009 ATP Challenger Tour. It took place in Buenos Aires, Argentina between 28 September and 4 October 2009.
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