2018 Mutua Madrid Open – Men's doubles

Łukasz Kubot and Marcelo Melo were the defending champions, but lost to Juan Sebastián Cabal and Robert Farah in the quarterfinals.

Nikola Mektić and Alexander Peya defeated Bob and Mike Bryan in the final, 5–3, after Bob Bryan retired due to a hip injury. The Bryan brothers would have regained the ATP no. 1 doubles ranking from Kubot and Melo if they had won the title. This was their first retirement as a team in 1,407 matches.

Seeds
All seeds received a bye into the second round. • # 🇵🇱 Łukasz Kubot / 🇧🇷 Marcelo Melo (quarterfinals)

• # 🇺🇸 Bob Bryan / 🇺🇸 Mike Bryan (final, retired)

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

• # 🇫🇷 Pierre-Hugues Herbert / 🇫🇷 Nicolas Mahut (semifinals)

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

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

• # Ivan Dodig / 🇺🇸 Rajeev Ram (second round)

• # 🇮🇳 Rohan Bopanna / 🇫🇷 Édouard Roger-Vasselin (second round)