| Doubles | ||||
|---|---|---|---|---|
| 2021 Heilbronner Neckarcup | ||||
| Final | ||||
| Champions |  Nathaniel Lammons Jackson Withrow | |||
| Runners-up |  André Göransson Sem Verbeek | |||
| Score | 6–7, 6–4, | |||
| Events | ||||
| ||||
| ||||
Kevin Krawietz and Andreas Mies were the defending champions but chose not to defend their title.
Nathaniel Lammons and Jackson Withrow won the title after defeating André Göransson and Sem Verbeek 6–7, 6–4, in the final.
Seeds
Aisam-ul-Haq Qureshi / 
Andrei Vasilevski (semifinals)- Sander Arends /
Divij Sharan (semifinals) - Nathaniel Lammons / Jackson Withrow (champions)
Rafael Matos / Felipe Meligeni Alves (quarterfinals)
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 | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | A-u-H Qureshi A Vasilevski
| 7 | 6 | ||||||||||||||||||||||||
 L Glasspool M Reid
| 3 | 6 | L Glasspool M Reid
| 6 | 4 | ||||||||||||||||||||||
 LD Martínez D Vega Hernández
| 6 | 4 | 1 | A-u-H Qureshi A Vasilevski
| 4 | 4 | |||||||||||||||||||||
| 4 | R Matos F Meligeni Alves
| 6 | 6 | A Göransson S Verbeek
| 6 | 6 | |||||||||||||||||||||
 I Sabanov M Sabanov
| 3 | 0 | 4 | R Matos F Meligeni Alves
| 4 | 6 | |||||||||||||||||||||
 D Masur D Molchanov
| 6 | 6 | A Göransson S Verbeek
| 6 | 7 | ||||||||||||||||||||||
| A Göransson S Verbeek
| 7 | 7 | A Göransson S Verbeek
| 7 | 4 | ||||||||||||||||||||||
| WC |  T Altuna A Çelikbilek
| 4 | 4 | 3 | N Lammons J Withrow
| 6 | 6 | ||||||||||||||||||||
| D Kudla M McDonald
| 6 | 6 | D Kudla M McDonald
| 6 | 2 | ||||||||||||||||||||||
 DE Galán T Griekspoor
| 3 | N Lammons J Withrow
| 7 | 6 | |||||||||||||||||||||||
| 3 | N Lammons J Withrow
| w/o | 3 | N Lammons J Withrow
| 6 | 6 | |||||||||||||||||||||
M Polmans A Sitak
| 6 | 6 | 2 | S Arends D Sharan
| 3 | 3 | |||||||||||||||||||||
| WC | A Begemann D Brown
| 4 | 4 | M Polmans A Sitak
| 2 | 6 | |||||||||||||||||||||
 T Daniel B Zapata Miralles
| 2 | 5 | 2 | S Arends D Sharan
| 6 | 3 | |||||||||||||||||||||
| 2 | S Arends D Sharan
| 6 | 7 | ||||||||||||||||||||||||
References
- "Krajinovic Captures Second Neckarcup Title". May 19, 2019.