2018 Challenger de Buenos Aires – Doubles

Ariel Behar and Fabiano de Paula were the defending champions but chose not to defend their title. Guido Andreozzi and Guillermo Durán won the title after defeating Marcelo Demoliner and Andrés Molteni 6–4, 4–6, [10–3] in the final.

2018 Challenger de Buenos Aires – Doubles

Ariel Behar and Fabiano de Paula were the defending champions but chose not to defend their title. Guido Andreozzi and Guillermo Durán won the title after defeating Marcelo Demoliner and Andrés Molteni 6–4, 4–6, [10–3] in the final.