2018 San Luis Open Challenger Tour – Doubles

Roberto Quiroz and Caio Zampieri were the defending champions but only Quiroz chose to defend his title, partnering Yannick Hanfmann. Quiroz lost in the quarterfinals to Jay Clarke and Kevin Krawietz.

Marcelo Arévalo and Miguel Ángel Reyes-Varela won the title after defeating Clarke and Krawietz 6–1, 6–4 in the final.

Seeds
• # 🇺🇸 Austin Krajicek / 🇺🇸 Jackson Withrow (semifinals)

• # Marcelo Arévalo / 🇲🇽 Miguel Ángel Reyes-Varela (champions)

• # 🇦🇷 Franco Agamenone / 🇵🇪 Sergio Galdós (quarterfinals)

• # 🇺🇸 Evan King / 🇺🇸 Nathan Pasha (first round)