2018 Challenger de Buenos Aires

The 2018 Challenger de Buenos Aires was a professional tennis tournament played on clay courts. It was the eighth edition of the tournament which was part of the 2018 ATP Challenger Tour. It took place in Buenos Aires, Argentina between 12 and 18 November 2018.

Seeds

 * 1 Rankings are as of November 5, 2018.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇦🇷 Francisco Cerúndolo
 * 🇦🇷 Juan Pablo Ficovich
 * 🇦🇷 Facundo Mena
 * 🇦🇷 Renzo Olivo

The following player received entry into the singles main draw as an alternate:
 * 🇦🇷 Andrea Collarini

The following players received entry from the qualifying draw:
 * 🇦🇷 Federico Coria
 * 🇧🇷 Orlando Luz
 * Bastián Malla
 * 🇦🇷 Gonzalo Villanueva

Singles

 * 🇪🇸 Pablo Andújar def. 🇦🇷 Pedro Cachin 6–3, 6–1.

Doubles

 * 🇦🇷 Guido Andreozzi / 🇦🇷 Guillermo Durán def. 🇧🇷 Marcelo Demoliner / 🇦🇷 Andrés Molteni 6–4, 4–6, [10–3].