Defending champion Marin Čilić defeated Roberto Bautista Agut in the final, 6–4, 6–4 to win the men's singles tennis title at the 2015 Kremlin Cup.
Seeds The top four seeds received a bye into the second round.
Draw
Finals
Top half
Bottom half
Qualifying
Seeds
Qualifiers
Qualifying draw
First qualifier
Second qualifier
Third qualifier
Fourth qualifier
External links Main draw Qualifying draw