Stadion: Court 1 Round: 28 Ground: Clay
| Challenger - Salzburg - Herrendoppel | 2021/07/08 15:00 | Erler/Neuchrist v Doumbia/Reboul | 6-4,6-4 |
| Challenger - Salzburg - Herrendoppel | 2021/07/07 14:25 | Erler/Neuchrist v Vatutin/Yevseyev | 6-0,6-3 |
| ITF - M25 - Klosters - Herrendoppel | 2021/06/25 12:25 | Erler/Neuchrist v Fallert/Moreno De Alboran | 4-6,6-7 |
| ITF - M25 - Klosters - Herrendoppel | 2021/06/24 13:05 | Erler/Neuchrist v Ehrat/Wenger | 6-3,6-4 |
| ITF - M25 - Klosters - Herrendoppel | 2021/06/22 12:05 | Erler/Neuchrist v Kym/Nikles | 6-3,6-4 |
| ITF - M25 - Biel - Herrendoppel | 2021/04/02 15:05 | Erler/Neuchrist v Paul/Steinegger | 6-3,4-6,10-2 |
| ITF - M25 - Biel - Herrendoppel | 2021/04/02 12:00 | Andreev/Mochizuki v Erler/Neuchrist | 2-6,1-6 |
| ITF - M25 - Biel - Herrendoppel | 2021/04/01 14:15 | Erler/Neuchrist v Ehrat/Kym | 6-4,7-6 |
| Challenger - Salzburg - Herrendoppel | 2021/07/08 15:25 | Huesler/Miedler v Galloway/Lawson | 5-7,2-6 |
| Challenger - Salzburg - Herrendoppel | 2021/07/07 11:55 | Galloway/Lawson v Molchanov/Nedovyesov | 7-6,6-4 |
| Challenger - Porto - Herrendoppel | 2021/07/02 13:10 | Olivo/Reyes-Varela v Galloway/Lawson | 6-2,6-4 |
| Challenger - Porto - Herrendoppel | 2021/07/01 15:35 | Galloway/Lawson v Istomin/Yevseyev | 7-5,6-3 |
| Challenger - Porto - Herrendoppel | 2021/06/30 10:00 | Galloway/Lawson v Faria/Rodrigues | 6-3,6-3 |
| Challenger - Mailand - Herrendoppel | 2021/06/23 11:00 | Kopriva/Lehecka v Galloway/Lawson | 6-4,6-3 |
| Challenger - Aix en Provence - Herrendoppel | 2021/06/19 15:45 | Doumbia/Reboul v Galloway/Lawson | 6-7,7-5,10-4 |
| Challenger - Aix en Provence - Herrendoppel | 2021/06/18 12:00 | Galloway/Lawson v Drzewiecki/Martos Gornes | 6-3,7-5 |