2018 Rio Open – Doubles

Pablo Carreño Busta and Pablo Cuevas were the defending champions, but withdrew before the tournament began.

David Marrero and Fernando Verdasco won the title, defeating Nikola Mektić and Alexander Peya in the final, 5–7, 7–5, [10–8]. Marrero and Verdasco were the first lucky loser team to win an ATP World Tour doubles title since 2014.

Seeds
• # 🇵🇱 Łukasz Kubot / 🇧🇷 Marcelo Melo (quarterfinals)

• # 🇬🇧 Jamie Murray / 🇧🇷 Bruno Soares (semifinals)

• # 🇨🇴 Juan Sebastián Cabal / 🇨🇴 Robert Farah (first round)

• # 🇲🇽 Santiago González / Julio Peralta (quarterfinals)

Seeds
• # 🇪🇸 David Marrero / 🇪🇸 Fernando Verdasco (qualifying competition, lucky losers)

• # Nicolás Jarry / 🇨🇿 Jiří Veselý (qualified)

Qualifiers

 * 1)  Nicolás Jarry / 🇨🇿 Jiří Veselý

Lucky losers

 * 1) 🇪🇸 David Marrero / 🇪🇸 Fernando Verdasco