# 2021 National Bank Open – Women's doubles

Barbora Krejčíková and Kateřina Siniaková were the defending champions from when the tournament was last held in 2019, but withdrew before the tournament began.
Gabriela Dabrowski and Luisa Stefani won the title, defeating Darija Jurak and Andreja Klepač in the final, 6–3, 6–4.

## Seeds

The top four seeds received a bye into the second round.
* Elise Mertens / Aryna Sabalenka (quarterfinals)
* Shuko Aoyama / Ena Shibahara (second round)
* Nicole Melichar / Demi Schuurs (second round)
* Alexa Guarachi / Desirae Krawczyk (quarterfinals)
* Gabriela Dabrowski / Luisa Stefani (champions)
* Darija Jurak / Andreja Klepač (final)
* Ellen Perez / Květa Peschke (quarterfinals)
* Coco Gauff / Jessica Pegula (first round)

## 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

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 5 | Gabriela Dabrowski Luisa Stefani | 6 | 6 | | | | |
| | Veronika Kudermetova Elena Rybakina | 2 | 3 | | | | |
| | Veronika Kudermetova Elena Rybakina | 2 | 3 | 5 | Gabriela Dabrowski Luisa Stefani | 6 | 6 |
| | | | | 6 | Darija Jurak Andreja Klepač | 3 | 4 |
| 6 | Darija Jurak Andreja Klepač | 7 | 6 | 6 | Darija Jurak Andreja Klepač | 3 | 4 |
| | Magda Linette Bernarda Pera | 5 | 4 | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | | 1 | E Mertens A Sabalenka | 7$^7$ | 6 | | | | | | | | | |
| WC | LA Fernandez R Marino | 5 | 6 | [10] | WC | LA Fernandez R Marino | 6$^4$ | 2 | | | | | | | | | |
| | E Lechemia I Neel | 7 | 3 | [2] | | | | | | 1 | E Mertens A Sabalenka | 2 | 2 | | | | |
| | E Bektas T Moore | 6 | 5 | [10] | | | | | | 5 | G Dabrowski L Stefani | 6 | 6 | | | | |
| | P Hercog A Van Uytvanck | 3 | 7 | [7] | | E Bektas T Moore | 5 | 2 | | | | | | | | | |
| | J Lohoff R Voráčová | 4 | 6 | [4] | 5 | G Dabrowski L Stefani | 7 | 6 | | | | | | | | | |
| 5 | G Dabrowski L Stefani | 6 | 4 | [10] | | | | | | | | | | 5 | G Dabrowski L Stefani | 6 | 6 |
| | | | | | | | | | | | | | | | V Kudermetova E Rybakina | 2 | 3 |
| | | | | | 3 | N Melichar D Schuurs | 3 | 6 | [4] | | | | | | | | |
| | U Eikeri C Harrison | 7 | 6 | | | U Eikeri C Harrison | 6 | 2 | [10] | | | | | | | | |
| | K Christian C McHale | 5 | 4 | | | | | | | | U Eikeri C Harrison | 0 | 2 | | | | |
| Alt | H Dart A Kontaveit | 2 | 2 | | | | | | | | V Kudermetova E Rybakina | 6 | 6 | | | | |
| | K Muchová Ka Plíšková | 6 | 6 | | | K Muchová Ka Plíšková | 2 | 4 | | | | | | | | | |
| | V Kudermetova E Rybakina | 6 | 6 | | | V Kudermetova E Rybakina | 6 | 6 | | | | | | | | | |
| 8 | C Gauff J Pegula | 2 | 4 | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | D Jurak A Klepač | 7 | 6 | | | | | | | | | | | | | | |
| | P Badosa S Sorribes Tormo | 5 | 2 | | 6 | D Jurak A Klepač | 6 | 7$^7$ | | | | | | | | | |
| | E Routliffe R van der Hoek | 6$^5$ | 6$^6$ | | | V Heisen A Rosolska | 0 | 6$^4$ | | | | | | | | | |
| | V Heisen A Rosolska | 7$^7$ | 7$^8$ | | | | | | 6 | D Jurak A Klepač | 6 | 6 | | | | | |
| | B Gumulya E Webley-Smith | 2 | 3 | | | | | | 4 | A Guarachi D Krawczyk | 4 | 2 | | | | | |
| WC | M Collard C Zhao | 6 | 6 | | WC | M Collard C Zhao | 3 | 4 | | | | | | | | | |
| | | | | | 4 | A Guarachi D Krawczyk | 6 | 6 | | | | | | | | | |
| | | | | | | | | | | | | | | 6 | D Jurak A Klepač | 7 | 6 |
| 7 | E Perez K Peschke | 6 | 7$^7$ | | | | | | | | | | | | M Linette B Pera | 5 | 4 |
| | L Kichenok M Ninomiya | 2 | 6$^3$ | | 7 | E Perez K Peschke | 6 | 6 | | | | | | | | | |
| | J Ostapenko D Yastremska | 4 | 6 | [12] | | J Ostapenko D Yastremska | 2 | 4 | | | | | | | | | |
| Alt | O Dodin K Rakhimova | 6 | 4 | [10] | | | | | 7 | E Perez K Peschke | 6 | 2 | [11] | | | | |
| | M Linette B Pera | 6 | 6 | | | | | | | M Linette B Pera | 1 | 6 | [13] | | | | |
| | O Kalashnikova H Watson | 0 | 0 | | | M Linette B Pera | 6 | 7$^7$ | | | | | | | | | |
| | | | | | 2 | S Aoyama E Shibahara | 4 | 6$^3$ | | | | | | | | | |