| Doubles | |
|---|---|
| 2021 Internazionali di Tennis Città di Todi | |
| Champions |  Francesco Forti Giulio Zeppieri |
| Runners-up |  Facundo Díaz Acosta  Alexander Merino |
| Score | 6–3, 6–2 |
Ariel Behar and Andrey Golubev were the defending champions [1] but chose not to defend their title.
Francesco Forti and Giulio Zeppieri won the title after defeating Facundo Díaz Acosta and Alexander Merino 6–3, 6–2 in the final.
Mark Vervoort / 
Federico Zeballos (semifinals) Flavio Cobolli / Andrea Pellegrino (first round) Marco Bortolotti / 
Cristian Rodríguez (quarterfinals) Tomás Martín Etcheverry / Thiago Agustín Tirante (quarterfinals, retired)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | M Vervoort F Zeballos | 5 | 7 | [10] | |||||||||||||||||||||||
| Mats Hermans G Smits | 77 | 7 | M Hermans G Smits | 7 | 5 | [8] | |||||||||||||||||||||
 M Pucinelli de Almeida P Sakamoto | 65 | 5 | 1 | M Vervoort F Zeballos | 2 | 66 | |||||||||||||||||||||
| 3 | M Bortolotti C Rodríguez | 6 | 1 | [10] | F Forti G Zeppieri | 6 | 78 | ||||||||||||||||||||
 D Popko  A Ritschard | 4 | 6 | [8] | 3 | M Bortolotti C Rodríguez | 3 | 4 | ||||||||||||||||||||
| Lorenzo Claverie A Mendoza | 65 | 4 | F Forti G Zeppieri | 6 | 6 | ||||||||||||||||||||||
| F Forti G Zeppieri | 77 | 6 | F Forti G Zeppieri | 6 | 6 | ||||||||||||||||||||||
| WC | M Arnaldi F Maestrelli | 62 | 6 | [7] | F Díaz Acosta A Merino | 3 | 2 | ||||||||||||||||||||
| F Díaz Acosta A Merino | 77 | 4 | [10] | F Díaz Acosta A Merino | 3 | ||||||||||||||||||||||
 Z Babić  F Fallert | 4 | 6 | [6] | 4 | TM Etcheverry TA Tirante | 2r | |||||||||||||||||||||
| 4 | TM Etcheverry TA Tirante | 6 | 3 | [10] | F Díaz Acosta A Merino | 6 | 3 | [10] | |||||||||||||||||||
 T Altuna  V Sachko | PR | A Motti J Ocleppo | 1 | 6 | [5] | ||||||||||||||||||||||
| PR | A Motti J Ocleppo | w/o | PR | A Motti J Ocleppo | 3 | 6 | [10] | ||||||||||||||||||||
| WC | Alessio De Bernardis F Passaro | 6 | 6 | WC | A De Bernardis F Passaro | 6 | 3 | [5] | |||||||||||||||||||
| 2/WC | F Cobolli A Pellegrino | 1 | 2 | ||||||||||||||||||||||||
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