2015 Kremlin Cup – Men's singles

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. • # Marin Čilić (champion)

• #🇪🇸 Roberto Bautista Agut (final)

• #🇷🇸 Viktor Troicki (second round)

• #🇩🇪 Philipp Kohlschreiber (semifinals)

• # Pablo Cuevas (second round)

• # Borna Ćorić (first round)

• # João Sousa (first round)

• #🇰🇿 Mikhail Kukushkin (second round)

Seeds
• # 🇷🇸 Dušan Lajović (qualified)

• # 🇯🇵 Tatsuma Ito (qualified)

• # 🇷🇺 Konstantin Kravchuk (qualifying competition)

• # 🇷🇺 Aslan Karatsev (qualified)

• # 🇩🇪 Tobias Kamke (qualifying competition)

• # 🇪🇸 Pere Riba (qualified)

• # 🇧🇦 Aldin Šetkić (second round)

• # 🇷🇸 Peđa Krstin (second round)

Qualifiers
• # 🇷🇸 Dušan Lajović

• # 🇯🇵 Tatsuma Ito

• # 🇪🇸 Pere Riba

• # 🇷🇺 Aslan Karatsev