2021 Poznań Open – Doubles
# 2021 Poznań Open – Doubles

Andrea Vavassori and David Vega Hernández were the defending champions but only Vega Hernández chose to defend his title, partnering Fernando Romboli. Vega Hernández lost in the semifinals to Zdeněk Kolář and Jiří Lehečka.

Kolář and Lehečka won the title after defeating Karol Drzewiecki and Aleksandar Vukic 6–4, 3–6, [10–5] in the final.

## Seeds

* Fernando Romboli / David Vega Hernández (semifinals)
* Szymon Walków / Jan Zieliński (quarterfinals)
* Evan King / Max Schnur (first round)
* Guido Andreozzi / Sergio Galdós (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

| First round | First round | First round | First round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 1 | F Romboli D Vega Hernández | 6 | 6 | | | | | | | | | | | | | | |
| | D Popko A Vatutin | 2 | 0 | 1 | F Romboli D Vega Hernández | 2 | $7^7$ | [10] | | | | | | | | | |
| WC | VV Cornea P Tsitsipas | 6 | 6 | WC | VV Cornea P Tsitsipas | 6 | $6^0$ | [3] | | | | | | | | | |
| WC | L Borg Aleksander Orlikowski | 2 | 4 | | | | | | 1 | F Romboli D Vega Hernández | $7^7$ | 4 | [8] | | | | |
| 3 | E King M Schnur | $6^5$ | 5 | | | | | | | Z Kolář J Lehečka | $6^4$ | 6 | [10] | | | | |
| | Z Kolář J Lehečka | $7^7$ | 7 | | Z Kolář J Lehečka | w/o | | | | | | | | | | | |
| | P Cachin B Zapata Miralles | 6 | 6 | | P Cachin B Zapata Miralles | | | | | | | | | | | | |
| | F Mena A Merino | 1 | 1 | | | | | | | | | | | Z Kolář J Lehečka | 6 | 3 | [10] |
| | C Denolly M Guinard | $6^2$ | 1 | | | | | | | | | | | K Drzewiecki A Vukic | 4 | 6 | [5] |
| | E Couacaud M Janvier | $7^7$ | 6 | | E Couacaud M Janvier | 6 | 3 | [10] | | | | | | | | | |
| | K Drzewiecki A Vukic | 6 | $7^9$ | | K Drzewiecki A Vukic | 3 | 6 | [12] | | | | | | | | | |
| 4 | G Andreozzi S Galdós | 3 | $6^7$ | | | | | | | K Drzewiecki A Vukic | 6 | 6 | | | | | |
| WC | M Kaśnikowski D Michalski | 3 | 4 | | | | | | | R Gonzales H Johnson | 4 | 4 | | | | | |
| | R Gonzales H Johnson | 6 | 6 | | R Gonzales H Johnson | 2 | $7^8$ | [13] | | | | | | | | | |
| | J Domingues G Elias | 2 | 2 | 2 | S Walków J Zieliński | 6 | $6^6$ | [11] | | | | | | | | | |
| 2 | S Walków J Zieliński | 6 | 6 | | | | | | | | | | | | | | |
