2018 Monte-Carlo Masters – Singles

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. Nadal also became the first man in the Open Era to win 11 titles at the same tournament. By winning the title, Nadal also retained the ATP no. 1 singles ranking. He did not lose a single set during the tournament, losing no more than 5 games per match, and lost just 21 games in total.