The 2015 Kremlin Cup was a tennis tournament played on indoor hard courts. It was the 26th edition of the Kremlin Cup for the men and the 20th edition for the women. The tournament was part of the ATP World Tour 250 Series of the 2015 ATP World Tour, and of the Premier Series of the 2015 WTA Tour. It was held at the Olympic Stadium in Moscow, Russia, from 19 October through 25 October 2015.
| Event | W | F | SF | QF | Round of 16 | Round of 32 | width=85 | Q | width=85 | Q3 | width=85 | Q2 | width=85 | Q1 |
| Singles[1] | 470 | 305 | 185 | 100 | 55 | 1 | 25 | 18 | 13 | 1 | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubles | 1 |
| width=130 bgcolor=dfe2e9 | Event | width=80 bgcolor=lime | W | width=85 bgcolor=thistle | F | width=85 bgcolor=ffff00 | SF | width=85 bgcolor=ffebcd | QF | width=85 bgcolor=afeeee | Round of 16 | width=85 bgcolor=afeeee | Round of 32 | width=85 | Q3 | width=85 | Q2 | width=85 | Q1 |
| style=background:#ededed | Singles | $131,230 | $70,080 | $37,430 | $20,120 | $10,790 | $6,846 | $3,075 | $1,636 | $910 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| style=background:#ededed | Doubles | $41,050 | $21,930 | $11,985 | $6,100 | $3,310 |
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Marin Čilić | 12 | 1 | ||
| Roberto Bautista Agut | 23 | 2 | ||
| Viktor Troicki | 24 | 3 | ||
| Philipp Kohlschreiber | 31 | 4 | ||
| Pablo Cuevas | 35 | 5 | ||
| Borna Ćorić | 40 | 6 | ||
| João Sousa | 45 | 7 | ||
| Mikhail Kukushkin | 50 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
Pablo Andújar →replaced by 
Mikhail Youzhny Marcel Granollers →replaced by Andrey Kuznetsov
Simone Bolelli (leg injury) Pere Riba (leg injury)| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
 Austria | Philipp Oswald |  Canada | Adil Shamasdin | 116 | 1 | |
 Belarus | Sergey Betov | Russian Federation | Mikhail Elgin | 142 | 2 | |
| Belarus | Aliaksandr Bury |  Uzbekistan | Denis Istomin | 156 | 3 | |
 Australia | Rameez Junaid |  Slovakia | Igor Zelenay | 161 | 4 |
The following pairs received wildcards into the doubles main draw:
Pere Riba (leg injury)The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
The following players received entry as lucky losers:
Ana Bogdan
Petra Kvitová →replaced by Kateřina Siniaková Karin Knapp →replaced by Olga Govortsova Ekaterina Makarova →replaced by 
Aleksandra Krunić
Agnieszka Radwańska (right shoulder injury) →replaced by Paula Kania Flavia Pennetta (right foot injury)| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
| Anna-Lena Grönefeld | Poland | Alicja Rosolska | 70 | 1 | ||
| Romania | Irina-Camelia Begu | Romania | Monica Niculescu | 77 | 2 | |
| Andreja Klepač | Czech Republic | Kateřina Siniaková | 86 | 3 | ||
 Ukraine | Lyudmyla Kichenok | Ukraine | Olga Savchuk | 102 | 4 |
The following pairs received wildcards into the doubles main draw:
See main article: 2015 Kremlin Cup – Men's singles.
Roberto Bautista Agut, 6–4, 6–4See main article: 2015 Kremlin Cup – Women's singles.
Svetlana Kuznetsova def. Anastasia Pavlyuchenkova 6–2, 6–1See main article: 2015 Kremlin Cup – Men's doubles.
Andrey Rublev / Dmitry Tursunov def. 
Radu Albot / František Čermák, 2–6, 6–1, [10–6]See main article: 2015 Kremlin Cup – Women's doubles.
Daria Kasatkina / Elena Vesnina def. Irina-Camelia Begu / Monica Niculescu 6–3, 6–7(7–9), [10–5]
France