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]
| 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 | ||
 France | ||||
 Slovakia | Martin Kližan | 45 | 8 |
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:
Jérémy Chardy → replaced by 
Ričardas Berankis
Laslo Đere
Evgeny Donskoy| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
| Julio Peralta |  Argentina | Horacio Zeballos | 71 | 1 | ||
| Austin Krajicek | Rajeev Ram | 93 | 2 | |||
 Belarus | Max Mirnyi |  Austria | Philipp Oswald | 100 | 3 | |
 Poland | Marcin Matkowski | Nicholas Monroe | 133 | 4 |
The following pairs received wildcards into the doubles main draw:
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Romania | ||||
 Czech Republic | Karolína Plíšková | 6 | 2 | |
| Sloane Stephens | 8 | 3 | ||
| Kiki Bertens | 10 | 4 | ||
| Anastasija Sevastova | 12 | 5 | ||
| Russian Federation | Daria Kasatkina | 14 | 6 | |
 Belgium | Elise Mertens | 15 | 7 | |
 Estonia | Anett Kontaveit | 21 | 8 |
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:
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| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
| Romania | Irina-Camelia Begu | Romania | Mihaela Buzărnescu | 50 | 1 | |
| Raquel Atawo | Anna-Lena Grönefeld | 59 | 2 | |||
| Poland | Alicja Rosolska | Abigail Spears | 60 | 3 | ||
 Georgia | Oksana Kalashnikova | Demi Schuurs | 79 | 4 |
The following pair received a wildcard into the doubles main draw:
The following pair received entry as alternates:
See main article: 2018 Kremlin Cup – Men's singles.
Karen Khachanov def. Adrian Mannarino, 6–2, 6–2See main article: 2018 Kremlin Cup – Women's singles.
Daria Kasatkina def. 
Ons Jabeur, 2–6, 7–6(7–3), 6–4See main article: 2018 Kremlin Cup – Men's doubles.
Austin Krajicek / Rajeev Ram def. Max Mirnyi / Philipp Oswald, 7–6(7–4), 6–4See main article: 2018 Kremlin Cup – Women's doubles.
Alexandra Panova / Laura Siegemund def. Darija Jurak / Raluca Olaru, 6–2, 7–6(7–2)