| 2018 Kremlin Cup | |
|---|---|
| Date | 15–21 October | 
| Edition | 29th (men) / 23rd (women) | 
| Surface | Hard | 
| Location | Moscow, Russia | 
| Venue | Olympic Stadium | 
| Champions | |
| Men's singles | |
| Women's singles | |
| Men's doubles | |
| Women's doubles | |
The 2018 Kremlin Cup (also known as the 2018 VTB Kremlin Cup for sponsorship reasons) was a tennis tournament played on indoor hard courts. It was the 29th edition of the Kremlin Cup for the men and the 23rd edition for the women. The tournament was part of the ATP World Tour 250 Series of the 2018 ATP World Tour, and of the Premier Series of the 2018 WTA Tour. It was the last tournament for now to be held at the Olympic Stadium in Moscow, Russia, from 15 October through 21 October 2018.[1][2]
ATP singles main-draw entrants
Seeds
| Country | Player | Rank1 | Seed | 
|---|---|---|---|
| Marco Cecchinato | 21 | 1 | |
| Daniil Medvedev | 22 | 2 | |
| Karen Khachanov | 27 | 3 | |
| Filip Krajinović | 35 | 4 | |
| Nick Kyrgios | 38 | 5 | |
| Damir Džumhur | 39 | 6 | |
| Martin Kližan | 45 | 8 | 
- Rankings are as of October 8, 2018
 
Other entrants
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser:
Withdrawals
- Before the tournament
 
 Jérémy Chardy → replaced by 
 Ričardas Berankis
 Pablo Cuevas → replaced by 
 Laslo Đere
 João Sousa → replaced by 
 Evgeny Donskoy
- During the tournament
 
Retirements
ATP doubles main-draw entrants
Seeds
| Country | Player | Country | Player | Rank1 | Seed | 
|---|---|---|---|---|---|
| Julio Peralta | Horacio Zeballos | 71 | 1 | ||
| Austin Krajicek | Rajeev Ram | 93 | 2 | ||
| Max Mirnyi | Philipp Oswald | 100 | 3 | ||
| Marcin Matkowski | Nicholas Monroe | 133 | 4 | 
- 1 Rankings are as of October 8, 2018
 
Other entrants
The following pairs received wildcards into the doubles main draw:
Withdrawals
- During the tournament
 
WTA singles main-draw entrants
Seeds
| Country | Player | Rank1 | Seed | 
|---|---|---|---|
| Karolína Plíšková | 6 | 2 | |
| Sloane Stephens | 8 | 3 | |
| Kiki Bertens | 10 | 4 | |
| Anastasija Sevastova | 12 | 5 | |
| Daria Kasatkina | 14 | 6 | |
| Elise Mertens | 15 | 7 | |
| Anett Kontaveit | 21 | 8 | 
- Rankings are as of October 8, 2018
 
Other entrants
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:
Withdrawals
- Before the tournament
 
 Dominika Cibulková → replaced by 
 Ajla Tomljanović
 Danielle Collins → replaced by 
 Ekaterina Makarova
 Simona Halep → replaced by 
 Valentini Grammatikopoulou
 Kaia Kanepi → replaced by 
 Yulia Putintseva
 Aryna Sabalenka → replaced by 
 Vitalia Diatchenko
 Barbora Strýcová → replaced by 
 Irina-Camelia Begu
WTA doubles main-draw entrants
Seeds
| Country | Player | Country | Player | Rank1 | Seed | 
|---|---|---|---|---|---|
| Irina-Camelia Begu | Mihaela Buzărnescu | 50 | 1 | ||
| Raquel Atawo | Anna-Lena Grönefeld | 59 | 2 | ||
| Alicja Rosolska | Abigail Spears | 60 | 3 | ||
| Oksana Kalashnikova | Demi Schuurs | 79 | 4 | 
- 1 Rankings are as of October 8, 2018
 
Other entrants
The following pair received a wildcard into the doubles main draw:
The following pair received entry as alternates:
Withdrawals
- Before the tournament
 
Champions
Men's singles
 Karen Khachanov def. 
 Adrian Mannarino, 6–2, 6–2
Women's singles
 Daria Kasatkina def. 
 Ons Jabeur, 2–6, 7–6(7–3), 6–4
Men's doubles
 Austin Krajicek / 
 Rajeev Ram def. 
 Max Mirnyi / 
 Philipp Oswald, 7–6(7–4), 6–4
Women's doubles
 Alexandra Panova / 
 Laura Siegemund def. 
 Darija Jurak / 
 Raluca Olaru, 6–2, 7–6(7–2)