2021 Kozerki Open – Doubles
# 2021 Kozerki Open – Doubles

Ania Hertel and Anastasiya Shoshyna were the defending champions but Shoshyna was unable to participate due to a doping suspension. Hertel partnered alongside Martyna Kubka, but lost in the semifinals to Bárbara Gatica and Rebeca Pereira.

Gatica and Pereira went on to win the title, defeating Jang Su-jeong and Lee Ya-hsuan in the final, 6–3, 6–1.

## Seeds

* Akgul Amanmuradova / Conny Perrin (semifinals)
* Dalila Jakupović / Diāna Marcinkēviča (quarterfinals)
* Amina Anshba / Anastasia Zakharova (first round)
* Alicia Barnett / Olivia Nicholls (quarterfinals)

## Draw

### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Draw

| First round | First round | First round | First round | First round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 1 | A Amanmuradova C Perrin | $6^0$ | 6 | [10] | | | | | | | | | | | | | |
| | H Kuwata Y Lizarazo | $7^7$ | 3 | [8] | 1 | A Amanmuradova C Perrin | 6 | 6 | | | | | | | | | |
| | S Herrmann A Ramé | 1 | 4 | | | A Kubareva D Vismane | 4 | 3 | | | | | | | | | |
| | A Kubareva D Vismane | 6 | 6 | | | | | | | 1 | A Amanmuradova C Perrin | 2 | 2 | | | | |
| 4 | A Barnett O Nicholls | 6 | 6 | | | | | | | | S-j Jang Y-h Lee | 6 | 6 | | | | |
| | I Burillo Escorihuela D Papamichail | 2 | 4 | | 4 | A Barnett O Nicholls | 2 | 6 | [7] | | | | | | | | |
| | S-j Jang Y-h Lee | 6 | 4 | [14] | | S-j Jang Y-h Lee | 6 | 3 | [10] | | | | | | | | |
| | N Hanatani A Prisăcariu | 3 | 6 | [12] | | | | | | | | | | | S-j Jang Y-h Lee | 3 | 1 |
| | F Contreras AS Sánchez | 5 | 1 | | | | | | | | | | | | B Gatica R Pereira | 6 | 6 |
| | A Hertel M Kubka | 7 | 6 | | | A Hertel M Kubka | $7^7$ | 1 | [10] | | | | | | | | |
| WC | A Collins A Gámiz | 2 | 6 | [10] | WC | A Collins A Gámiz | $6^4$ | 6 | [7] | | | | | | | | |
| 3 | A Anshba A Zakharova | 6 | 0 | [3] | | | | | | | A Hertel M Kubka | 6 | 2 | [7] | | | |
| WC | W Baszak V Olianovskaia | 3 | 6 | [8] | | | | | | | B Gatica R Pereira | 3 | 6 | [10] | | | |
| | B Gatica R Pereira | 6 | 4 | [10] | | B Gatica R Pereira | 6 | 6 | | | | | | | | | |
| WC | WJ Foryś R Gruszczyńska | 4 | 2 | | 2 | D Jakupović D Marcinkēviča | 2 | 4 | | | | | | | | | |
| 2 | D Jakupović D Marcinkēviča | 6 | 6 | | | | | | | | | | | | | | |
