Champ: | Nikola Mektić Alexander Peya |
Runner: | Bob Bryan Mike Bryan |
Score: | 5–3, ret. |
See main article: 2018 Mutua Madrid Open.
Łukasz Kubot and Marcelo Melo were the defending champions, but lost to Juan Sebastián Cabal and Robert Farah in the quarterfinals.[1]
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.[2] This was their first retirement as a team in 1,407 matches.[3]
All seeds received a bye into the second round.