Two-time defending champion Rafael Nadal defeated Kei Nishikori in the final, 6–3, 6–2 to win the singles tennis title at the 2018 Monte-Carlo Masters. It was his record-extending 11th Monte-Carlo Masters title and his record 31st Masters title.[1] By winning the title, Nadal also retained the ATP no. 1 singles ranking.[citation needed] He did not lose a single set during the tournament.
Seeds
The top eight seeds receive a bye into the second round.