| Doubles | |
|---|---|
| 2021 Internazionali di Tennis del Friuli Venezia Giulia | |
| Champions |  Orlando Luz Rafael Matos |
| Runners-up |  Sergio Galdós  Renzo Olivo |
| Final score | 6–4, 7–6(7–5) |
Ariel Behar and Andrey Golubev were the defending champions [1] but chose not to defend their title.
Orlando Luz and Rafael Matos won the title after defeating Sergio Galdós and Renzo Olivo 6–4, 7–6(7–5) in the final.
Orlando Luz / Rafael Matos (champions)
Zdeněk Kolář / 
Luis David Martínez (semifinals)
Robert Galloway / Alex Lawson (first round) Evan King / Max Schnur (semifinals)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | O Luz R Matos | 77 | 78 | ||||||||||||||||||||||||
| PR |  A Motti J Ocleppo | 63 | 66 | 1 | O Luz R Matos | 6 | 6 | ||||||||||||||||||||
| F Cerúndolo JM Cerúndolo | 6 | 6 | F Cerúndolo JM Cerúndolo | 1 | 1 | ||||||||||||||||||||||
| WC | Luca Serena Daniele Valentino | 3 | 1 | 1 | O Luz R Matos | 6 | 77 | ||||||||||||||||||||
| 4 | E King M Schnur | 2 | 6 | [10] | 4 | E King M Schnur | 4 | 64 | |||||||||||||||||||
| F Baldi A Pellegrino | 6 | 2 | [8] | 4 | E King M Schnur | 6 | 64 | [10] | |||||||||||||||||||
 M Cuevas  H Dellien | 5 | 5 | WC | F Forti G Zeppieri | 2 | 77 | [8] | ||||||||||||||||||||
| WC | F Forti G Zeppieri | 7 | 7 | 1 | O Luz R Matos | 6 | 77 | ||||||||||||||||||||
| WC | Gregorio De Gasper Angelo Rossi | 2 | 0 | S Galdós R Olivo | 4 | 65 | |||||||||||||||||||||
| S Galdós R Olivo | 6 | 6 | S Galdós R Olivo | 77 | 6 | ||||||||||||||||||||||
JC Aragone  N Barrientos | 6 | 6 | JC Aragone N Barrientos | 65 | 3 | ||||||||||||||||||||||
| 3 | R Galloway A Lawson | 4 | 4 | S Galdós R Olivo | 6 | 5 | [12] | ||||||||||||||||||||
| J Menezes TA Tirante | 2 | Z Kolář LD Martínez | 4 | 7 | [10] | ||||||||||||||||||||||
| Alt | A Merino C Ugo Carabelli | w/o | Alt | A Merino C Ugo Carabelli | 0 | 3 | |||||||||||||||||||||
 Q Halys G Simon | 6 | 1 | [7] | 2 | Z Kolář LD Martínez | 6 | 6 | ||||||||||||||||||||
| 2 | Z Kolář LD Martínez | 4 | 6 | [10] | |||||||||||||||||||||||
Kamil Majchrzak and Martin Redlicki were the defending champions, having won the event in 2013. However, neither participated in the 2014 event; Redlicki's age by the 2014 event's qualifying cutoff made him ineligible to continue to participate in junior events and Majchrzak chose not to participate.
Hugo Dellien and Guillermo Durán were the defending champions but only Dellien chose to defend his title, partnering Federico Zeballos. Dellien and Zeballos withdrew before their quarterfinal match.
Guillermo Durán and Roberto Quiroz were the defending champions but only Quiroz chose to defend his title, partnering Yannick Hanfmann. Quiroz lost in the first round to Luis David Martínez and Felipe Meligeni Alves.
Guido Andreozzi and Guillermo Durán were the defending champions but chose not to defend their title.
Guido Andreozzi and Guillermo Durán were the defending champions but only Durán chose to defend his title, partnering Mariano Kestelboim. Durán lost in the first round to Facundo Mena and Camilo Ugo Carabelli.
Evan King and Nathan Pasha were the defending champions but chose to defend their title with different partners. King partnered Fernando Romboli but lost in the first round to Robert Galloway and Hans Hach Verdugo. Pasha partnered Max Schnur but lost in the first round to Carlos Gómez-Herrera and Viktor Troicki.
This was the first edition of the tournament.
Orlando Luz and Rafael Matos were the defending champions but only Matos chose to defend his title, partnering João Menezes. Matos withdrew from the tournament before his quarterfinal match.
This was the first edition of the tournament.
Franco Agamenone and Fernando Romboli were the defending champions but chose not to defend their title.
Roberto Maytín and Fernando Romboli were the defending champions but chose not to defend their title.
Sander Gillé and Joran Vliegen were the defending champions but chose not to defend their title.
Rafael Matos and João Menezes were the defending champions but chose not to defend their title.
Radu Albot and Enrique López Pérez were the defending champions but chose not to defend their title.
Sadio Doumbia and Fabien Reboul were the defending champions but chose not to defend their title.
Máximo González and Fabrício Neis were the defending champions but chose not to defend their title.
Orlando Luz and Rafael Matos were the defending champions but chose not to compete.
This was the first edition of the tournament as part of the Legión Sudamericana.
Orlando Luz and Rafael Matos were the defending champions but chose not to defend their title.
Orlando Luz and Rafael Matos were the defending champions but chose not to defend their title.