| Doubles | |
|---|---|
| 2021 Sparkassen ATP Challenger | |
| Champions |  Antonio Šančić  Tristan-Samuel Weissborn |
| Runners-up | Alexander Erler Lucas Miedler |
| Score | 7–6(10–8), 4–6, [10–8] |
Andre Begemann and Albano Olivetti were the defending champions [1] but chose not to defend their title.
Antonio Šančić and Tristan-Samuel Weissborn won the title after defeating Alexander Erler and Lucas Miedler 7–6(10–8), 4–6, [10–8] in the final.
Ivan Sabanov / Matej Sabanov (semifinals) Antonio Šančić / Tristan-Samuel Weissborn (champions) Alexander Erler / Lucas Miedler (final)
Diego Hidalgo / Roberto Quiroz (first round)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | I Sabanov M Sabanov | 6 | 4 | [10] | |||||||||||||||||||||||
 M Copil E Gómez | 2 | 6 | [6] | 1 | I Sabanov M Sabanov | 6 | 6 | ||||||||||||||||||||
 N Fatić A Šetkić | 5 | 3 |  K Kivattsev A Virgili | 2 | 2 | ||||||||||||||||||||||
| Kirill Kivattsev Augusto Virgili | 7 | 6 | 1 | I Sabanov M Sabanov | 5 | 3 | |||||||||||||||||||||
| 3 | A Erler L Miedler | 6 | 6 | 3 | A Erler L Miedler | 7 | 6 | ||||||||||||||||||||
| WC | Patric Prinoth Alexander Weis | 3 | 2 | 3 | A Erler L Miedler | 6 | 77 | ||||||||||||||||||||
| F Forti F Gaio | 6 | 6 | F Forti F Gaio | 2 | 65 | ||||||||||||||||||||||
 B Lock CJ Lock | 3 | 1 | 3 | A Erler L Miedler | 68 | 6 | [8] | ||||||||||||||||||||
 V Sachko  T van Rijthoven | 77 | 77 | 2 | A Šančić T-S Weissborn | 710 | 4 | [10] | ||||||||||||||||||||
 A Cozbinov  M Cressy | 64 | 62 | V Sachko T van Rijthoven | 77 | 3 | [4] | |||||||||||||||||||||
 J Draper B Gojo | 6 | 77 | J Draper B Gojo | 65 | 6 | [10] | |||||||||||||||||||||
| 4 | D Hidalgo R Quiroz | 4 | 64 | J Draper B Gojo | 6 | 3 | [8] | ||||||||||||||||||||
| WC | M Arnaldi Samuel Vincent Ruggeri | 6 | 62 | [10] | 2 | A Šančić T-S Weissborn | 3 | 6 | [10] | ||||||||||||||||||
| WC | Gabriel Moroder Erwin Tröbinger | 1 | 77 | [8] | WC | M Arnaldi S Vincent Ruggeri | 4 | 4 | |||||||||||||||||||
D Pichler  David Poljak | 64 | 711 | [4] | 2 | A Šančić T-S Weissborn | 6 | 6 | ||||||||||||||||||||
| 2 | A Šančić T-S Weissborn | 77 | 69 | [10] | |||||||||||||||||||||||
Sander Arends and Tristan-Samuel Weissborn were the defending champions but only Weissborn chose to defend his title, partnering Dino Marcan. Weissborn lost in the quarterfinals to Hugo Nys and Max Schnur.
Kevin Krawietz and Albano Olivetti were the defending champions but lost in the first round to Tomasz Bednarek and David Pel.
Hans Podlipnik-Castillo and Andrei Vasilevski were the defending champions but chose not to defend their title.
Evgeny Donskoy and Mikhail Elgin were the defending champions but chose not to defend their title.
Roman Jebavý and Igor Zelenay were the defending champions but chose not to defend their title.
Marin and Tomislav Draganja were the defending champions but only Tomislav chose to defend his title, partnering Nikola Čačić. Tomislav Draganja lost in the quarterfinals to Rameez Junaid and David Pel.
Gerard Granollers and Lukáš Rosol were the defending champions but chose not to defend their title.
Sander Arends and Tristan-Samuel Weissborn were the defending champions but only Weissborn chose to defend his title, partnering Antonio Šančić. Weissborn successfully defended his title after defeating Teymuraz Gabashvili and Lukáš Lacko 7–5, 6–7(5–7), [10–7] in the final.
Szymon Walków and Tristan-Samuel Weissborn were the defending champions but chose not to defend their title.
The 2021 Sparkassen ATP Challenger was a professional tennis tournament played on indoor hard courts in Ortisei, Italy between 8 and 14 November 2021. It was the twelfth edition of the tournament and was part of the 2021 ATP Challenger Tour.
Frederik Nielsen and Tim Pütz were the defending champions but chose not to defend their title.
This was the first edition of the tournament.
This was the first edition of the tournament.
Antonio Šančić and Tristan-Samuel Weissborn were the defending champions but chose not to defend their title.
Denys Molchanov and Aleksandr Nedovyesov were the defending champions but chose not to defend their title.
Pedro Cachin and Facundo Mena were the defending champions but chose not to defend their title.
Dustin Brown and Andrea Vavassori were the defending champions but only Brown chose to defend his title, partnering Evan King. Brown lost in the first round to Lukáš Klein and Igor Zelenay.
Alexander Erler and Lucas Miedler were the defending champions but lost in the final to Ivan and Matej Sabanov.
This was the first edition of the tournament.
Alexander Erler and Lucas Miedler were the defending champions but lost in the semifinals to Reese Stalder and Petros Tsitsipas.