2021 Argentina Open – Doubles
# 2021 Argentina Open – Doubles

Marcel Granollers and Horacio Zeballos were the defending champions, but they decided not to participate this year.

Tomislav Brkić and Nikola Ćaćić won the title, defeating Ariel Behar and Gonzalo Escobar in the final, 6–3, 7–5.

## Seeds

* Austin Krajicek / Franko Škugor (semifinals)
* Marcelo Demoliner / Santiago González (first round)
* Simone Bolelli / Máximo González (quarterfinals)
* Ariel Behar / Gonzalo Escobar (final)

## 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 | Final |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 1 | A Krajicek F Škugor | 2 | 6 | [10] | | | | | | | | | | | | | | |
| | P Andújar J Munar | 6 | 3 | [8] | 1 | A Krajicek F Škugor | 6 | 6 | | | | | | | | | | |
| | N Monroe A Sitak | 6 | $6^3$ | [7] | WC | F Cerúndolo F Coria | 4 | 2 | | | | | | | | | | |
| WC | F Cerúndolo F Coria | 3 | $7^7$ | [10] | | | | | | 1 | A Krajicek F Škugor | $6^6$ | 6 | [3] | | | | |
| 4 | A Behar G Escobar | 6 | $6^9$ | [10] | | | | | | 4 | A Behar G Escobar | $7^8$ | 4 | [10] | | | | |
| | M Kecmanović G Mager | 3 | $7^{11}$ | [6] | 4 | A Behar G Escobar | 6 | $7^7$ | | | | | | | | | | |
| | O Marach LD Martínez | 6 | 3 | [11] | | O Marach LD Martínez | 2 | $6^3$ | | | | | | | | | | |
| | R Arneodo B Paire | 4 | 6 | [9] | | | | | | | | | | | 4 | A Behar G Escobar | 3 | 5 |
| | G Durán A Molteni | 2 | 1 | | | | | | | | | | | | | T Brkić N Ćaćić | 6 | 7 |
| | D Koepfer J Sousa | 6 | 6 | | | D Koepfer J Sousa | 4 | $7^7$ | [10] | | | | | | | | | |
| WC | F Díaz Acosta TA Tirante | $6^5$ | 1 | | 3 | S Bolelli M González | 6 | $6^4$ | [5] | | | | | | | | | |
| 3 | S Bolelli M González | $7^7$ | 6 | | | | | | | | D Koepfer J Sousa | 6 | $6^5$ | [5] | | | | |
| | T Brkić N Ćaćić | 6 | 6 | | | | | | | | T Brkić N Ćaćić | 3 | $7^7$ | [10] | | | | |
| Alt | R Carballés Baena S Caruso | 3 | 4 | | | T Brkić N Ćaćić | w/o | | | | | | | | | | | |
| | A Göransson T Monteiro | 6 | 6 | | | A Göransson T Monteiro | | | | | | | | | | | | |
| 2 | M Demoliner S González | 4 | 2 | | | | | | | | | | | | | | | |
