| Women's doubles | |
|---|---|
| 2021 Kremlin Cup | |
| Champions | |
| Runners-up | |
| Score | 6–2, 4–6, [10–8] |
Shuko Aoyama and Ena Shibahara were the defending champions, having won the previous event in 2019, [1] but chose not to participate.
Jeļena Ostapenko and Kateřina Siniaková won the title, defeating Nadiia Kichenok and Raluca Olaru in the final, 6–2, 4–6, [10–8]. [2] Ostapenko and Siniaková won the title after saving three match points in their quarterfinal match against Viktória Kužmová and Alexandra Panova. This was the first time that Siniaková won a doubles title without regular partner Barbora Krejčíková since January 2019. [3]
| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | | 3 | 1 | ||||||||||||||||||||||||
| | 6 | 6 | | 1 | 6 | [7] | |||||||||||||||||||||
| WC | | 4 | 7 | [8] | | 6 | 4 | [10] | |||||||||||||||||||
| | 6 | 5 | [10] | | 5 | 5 | |||||||||||||||||||||
| 4 | | 0 | 6 | [10] | 4 | | 7 | 7 | |||||||||||||||||||
| | 6 | 2 | [4] | 4 | | 5 | |||||||||||||||||||||
| | 4 | 0 | | 2r | |||||||||||||||||||||||
| | 6 | 6 | 4 | | 2 | 6 | [8] | ||||||||||||||||||||
| | 1 | 6 | [7] | 2 | | 6 | 4 | [10] | |||||||||||||||||||
| | 6 | 4 | [10] | | 4 | 2 | |||||||||||||||||||||
| | 1 | 1 | 3 | | 6 | 6 | |||||||||||||||||||||
| 3 | | 6 | 6 | 3 | | 2 | 7 | [2] | |||||||||||||||||||
| | 7 | 6 | 2 | | 6 | 5 | [10] | ||||||||||||||||||||
| | 5 | 2 | | 7 | 3 | [9] | |||||||||||||||||||||
| PR | | 3 | 2 | 2 | | 5 | 6 | [11] | |||||||||||||||||||
| 2 | | 6 | 6 | ||||||||||||||||||||||||