Rafael Nadal clinches his 11th Rolex Monte-Carlo Masters title on Sunday, after beating Japan's Kei Nishikori in straight sets.

Kei Nishikori earns 600 ATP Rankings points after reaching his first final of 2018 at the Rolex Monte-Carlo Masters.

Rafael Nadal celebrates his 11th Monte-Carlo title.

Rafael Nadal defeats Kei Nishikori to win a record 31st ATP World Tour Masters 1000 crown on Sunday at the Rolex Monte-Carlo Masters.

Rafael Nadal defeats Kei Nishikori in straight sets to win his 11th Rolex Monte-Carlo Masters title on Sunday.

Bob Bryan and Mike Bryan beat Olivier Marach and Mate Pavic to win the Rolex Monte-Carlo Masters on Sunday.

Bob Bryan and Mike Bryan defeat Olivier Marach and Mate Pavic to win their sixth Rolex Monte-Carlo Masters title on Sunday.

Third seeds Mate Pavic and Oliver Marach move within a victory of their fourth tour-level title of the season.

Top-seeded Rafael Nadal beats Grigor Dimitrov in Monte-Carlo Saturday to move within one victory of a record 31st ATP World Tour Masters 1000 trophy.

Kei Nishikori books his spot in the championship match at the Rolex Monte-Carlo Masters.

Grigor Dimitrov reached the semi-finals at the Rolex Monte-Carlo Masters for the first time, but lost against World No. 1 Rafael Nadal.

World No. 1 Rafael Nadal extends his FedEx ATP Head2Head series lead against Grigor Dimitrov to 11-1 in Monte-Carlo Saturday.

World No. 1 Rafael Nadal advances to his 12th (10-1) Rolex Monte-Carlo Masters final after beating No. 4 seed Grigor Dimitrov Saturday.

Bob Bryan and Mike Bryan advance to the final at the Rolex Monte-Carlo Masters. The Americans will play for their 116th tour-level title together.

Alexander Zverev outlasts Richard Gasquet to advance to the Monte-Carlo semi-finals for the first time.

Spanish fans cheer on their charge, Rafael Nadal, during his quarter-final match against Dominic Thiem.

David Goffin unloads a forehand during his match against Grigor Dimitrov.

Marin Cilic slides into a backhand volley against Kei Nishikori.

Kei Nishikori tracks down a forehand against Marin Cilic at the Rolex Monte-Carlo Masters on Friday.

Grigor Dimitrov, left, embraces his friend and doubles partner David Goffin following the Bulgarian's win at the Monte-Carlo Open on Friday.

Rafael Nadal unleashes his patented forehand during his quarter-final match against Dominic Thiem in Monte-Carlo on Friday.

Croatian legend Goran Ivanisevic signs autographs and poses for photos at the Sergio Tacchini booth at the Rolex Monte-Carlo Masters on Friday.

Alexander Zverev chases down a forehand during his quarter-final match in Monte-Carlo on Friday.

Marin Cilic launches into serve mode during his match against Kei Nishikori in Monte-Carlo on Friday.

Kei Nishikori's forehand was in full effect as he defeated Marin Cilic 6-4, 6-7(1), 6-3 in Monte Carlo on Friday.