2018 Lima Challenger – Singles

Gerald Melzer was the defending champion but lost in the first round to Paolo Lorenzi.

Christian Garín won the title after defeating Pedro Sousa 6–4, 6–4 in the final.

Seeds
• # Pablo Cuevas (first round)

• # 🇦🇷 Federico Delbonis (quarterfinals, withdrew)

• # 🇦🇷 Guido Andreozzi (second round)

• # Christian Garín (champion)

• # 🇪🇸 Pablo Andújar (second round)

• # 🇧🇷 Thiago Monteiro (semifinals)

• # 🇮🇹 Paolo Lorenzi (second round)

• # 🇧🇴 Hugo Dellien (quarterfinals)