2018 Western & Southern Open – Men's doubles

Pierre-Hugues Herbert and Nicolas Mahut were the defending champions, but Herbert chose not to participate this year. Mahut played alongside Édouard Roger-Vasselin, but they lost in the second round to Philipp Kohlschreiber and Fernando Verdasco.

Jamie Murray and Bruno Soares won the title, defeating Juan Sebastián Cabal and Robert Farah in the final, 4–6, 6–3, [10–6].

Seeds
All seeds received a bye into the second round. • # 🇦🇹 Oliver Marach / Mate Pavić (second round)

• # 🇺🇸 Mike Bryan / 🇺🇸 Jack Sock (second round)

• # 🇫🇮 Henri Kontinen / 🇦🇺 John Peers (quarterfinals)

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

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

• # Jean-Julien Rojer / 🇷🇴 Horia Tecău (semifinals)

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

• # 🇫🇷 Nicolas Mahut / 🇫🇷 Édouard Roger-Vasselin (second round)