2021 Garden Open II – Doubles
# 2021 Garden Open II – Doubles

Sadio Doumbia and Fabien Reboul were the defending champions and successfully defended their title, defeating Guido Andreozzi and Guillermo Durán 7–5, 6–3 in the final.

## Seeds

* Nathaniel Lammons / Jackson Withrow (semifinals)
* Rafael Matos / Felipe Meligeni Alves (quarterfinals)
* Albano Olivetti / Matt Reid (quarterfinals)
* Robert Galloway / Alex Lawson (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 | First round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 1 | N Lammons J Withrow | 7 | 6 | | | | | | | | | | | | | | |
| WC | S Napolitano L Vanni | 5 | 3 | | 1 | N Lammons J Withrow | 4 | 6 | [10] | | | | | | | | |
| | H Dellien D Petrović | 3 | $6^7$ | | | H Gaston T Lamasine | 6 | 1 | [6] | | | | | | | | |
| | H Gaston T Lamasine | 6 | $7^9$ | | | | | | | 1 | N Lammons J Withrow | 3 | 4 | | | | |
| 3 | A Olivetti M Reid | $7^7$ | 2 | | | | | | | | G Andreozzi G Durán | 6 | 6 | | | | |
| WC | A Pellegrino G Zeppieri | $6^3$ | $2^r$ | | 3 | A Olivetti M Reid | $6^6$ | 6 | [5] | | | | | | | | |
| | R Arneodo E Couacaud | 6 | 4 | [8] | | G Andreozzi G Durán | $7^8$ | 4 | [10] | | | | | | | | |
| | G Andreozzi G Durán | 4 | 6 | [10] | | | | | | | | | | | G Andreozzi G Durán | 5 | 3 |
| | A Sitak J Zieliński | $6^4$ | $6^4$ | | | | | | | | | | | | S Doumbia F Reboul | 7 | 6 |
| | P Lorenzi JP Varillas | $7^7$ | $7^7$ | | | P Lorenzi JP Varillas | 2 | 7 | [2] | | | | | | | | |
| | R Bemelmans A Göransson | 6 | 2 | [11] | | R Bemelmans A Göransson | 6 | 5 | [10] | | | | | | | | |
| 4 | R Galloway A Lawson | 2 | 6 | [9] | | | | | | | R Bemelmans A Göransson | 3 | 6 | [7] | | | |
| WC | F Cobolli M Gigante | 5 | $7^7$ | [7] | | | | | | | S Doumbia F Reboul | 6 | 3 | [10] | | | |
| | S Doumbia F Reboul | 7 | $6^4$ | [10] | | S Doumbia F Reboul | $7^7$ | 5 | [10] | | | | | | | | |
| | S Diez S Martos Gornés | 6 | 3 | [6] | 2 | R Matos F Meligeni Alves | $6^5$ | 7 | [6] | | | | | | | | |
| 2 | R Matos F Meligeni Alves | 4 | 6 | [10] | | | | | | | | | | | | | |
