The 2018 Monte-Carlo Masters (also known as the Rolex Monte-Carlo Masters for sponsorship reasons) was a tennis tournament for male professional players that was played on outdoor clay courts. It was the 112th edition of the annual Monte Carlo Masters tournament, sponsored by Rolex for the tenth time. It took place at the Monte Carlo Country Club in Roquebrune-Cap-Martin, France (though billed as Monte Carlo, Monaco).
Because the Monte Carlo Masters is the non-mandatory Masters 1000 event, special rules regarding points distribution are in place. The Monte Carlo Masters counts as one of a player's 500 level tournaments, while distributing Masters 1000 points.[1]
| Event | Round of 16 | Round of 32 | Round of 64 | width=85 | width=85 | width=85 | |||||||
| Men's singles[2] | 1,000 | 600 | 360 | 180 | 90 | 45 | 10 | 25 | 16 | 0 | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Men's doubles | 0 |
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Spain | Rafael Nadal | 1 | 1 | |
| Marin Čilić | 3 | 2 | ||
| 4 | 3 | |||
| Grigor Dimitrov | 5 | 4 | ||
 Austria | Dominic Thiem | 7 | 5 | |
 Belgium | David Goffin | 10 | 6 | |
 France | Lucas Pouille | 11 | 7 | |
| Spain | ||||
 Serbia | Novak Djokovic | 13 | 9 | |
 Argentina | Diego Schwartzman | 15 | 10 | |
| Spain | Roberto Bautista Agut | 17 | 11 | |
 Czech Republic | Tomáš Berdych | 18 | 12 | |
 Italy | Fabio Fognini | 20 | 13 | |
 Canada | Milos Raonic | 22 | 14 | |
| Spain | Albert Ramos Viñolas | 23 | 15 | |
| France | Adrian Mannarino | 25 | 16 |
The following players received wildcards into the main draw:
The following players received entry via the qualifying draw:
Marco Cecchinato Jérémy Chardy Pierre-Hugues Herbert
Ilya Ivashka Dušan Lajović Andreas SeppiThe following players received entry as lucky losers:
Pablo Carreño Busta → replaced by Guillermo García López
Aleksandr Dolgopolov → replaced by 
Mirza Bašić David Ferrer → replaced by Guido Pella Filip Krajinović → replaced by Florian Mayer Leonardo Mayer → replaced by 
Márton Fucsovics Gaël Monfils → replaced by Julien Benneteau Jo-Wilfried Tsonga → replaced by 
Tennys SandgrenThe following pairs received wildcards into the doubles main draw:
The following pairs received entry as alternates:
See main article: 2018 Monte-Carlo Masters – Singles.
Rafael Nadal def. 
Kei Nishikori, 6–3, 6–2See main article: article and 2018 Monte-Carlo Masters – Doubles.
Bob Bryan / Mike Bryan def. Oliver Marach / Mate Pavić, 7–6(7–5), 6–3.
Poland
Brazil
Finland
Romania
United Kingdom