| Men's Singles | |
|---|---|
| 2015 Kremlin Cup | |
| Champion |
|
| Runner-up |
|
| Final score | 6–4 6–4 |
Marin Čilić was the defending champion and successfully defended his title, defeating Roberto Bautista Agut in the final, 6–4, 6–4.
The top four seeds received a bye into the second round.