2018 Mutua Madrid Open – Men's Singles
was the defending champion, but lost to Dominic Thiem in the quarterfinals.
Alexander Zverev won the title, defeating Thiem in the final, 6–4, 6–4.
Despite his withdrawal from the clay court season, Roger Federer regained the ATP no. 1 singles ranking as Nadal failed to defend his title.Seeds
The top eight seeds receive a bye into the second round.Draw
Finals
Top half
Section 2
Section 3
Section 4
Seeds
Qualifiers
Qualifying draw
First qualifier
Second qualifier
Third qualifier
Fourth qualifier
Sixth qualifier