2021 Kremlin Cup


The 2021 Kremlin Cup was a professional tennis tournament played on indoor hard courts. It was the 31st edition of the Kremlin Cup for the men and the 25th edition for the women. The tournament was part of the ATP 250 series of the 2021 ATP Tour, and of the WTA 500 series of the 2021 WTA Tour. It was held at the Irina Viner-Usmanova Gymnastics Palace and the Luzhniki Palace of Sports in Moscow, Russia, from 18 October through 24 October 2021.

Champions

Men's singles

Aslan Karatsev def. Marin Čilić, 6–2, 6–4

Women's singles

Anett Kontaveit def. Ekaterina Alexandrova, 4–6, 6–4, 7–5.
This was Kontaveit's 4th WTA title, and 3rd of the year.

Men's doubles

Harri Heliövaara / Matwé Middelkoop def. Tomislav Brkić / Nikola Ćaćić, 7–5, 4–6,

Women's doubles

Jeļena Ostapenko / Kateřina Siniaková def. Nadiia Kichenok / Raluca Olaru, 6–2, 4–6,

ATP singles main-draw entrants

Seeds

Other entrants

The following players received wildcards into the singles main draw:
The following players received entry using a protected ranking:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser:

Withdrawals

;Before the tournament

ATP doubles main-draw entrants

Seeds

CountryPlayerCountryPlayerRank1Seed
South Africa

Other entrants

The following pairs received wildcards into the doubles main draw:

Withdrawals

;Before the tournament

WTA singles main-draw entrants

Seeds

  • Rankings are as of October 4, 2021.

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

WTA doubles main-draw entrants

Seeds

CountryPlayerCountryPlayerRank1Seed
Chile

Other entrants

The following pair received a wildcard into the doubles main draw:
The following pair received entry using a protected ranking:

Withdrawals

;Before the tournament