Stadium: Center Court Round: 27 Ground: Clay
| Challenger Salzburg MD | 2021/07/07 14:25 | Erler/Neuchrist v Vatutin/Yevseyev | 6-0,6-3 |
| ITF M25 Klosters MD | 2021/06/25 12:25 | Erler/Neuchrist v Fallert F / Moreno de Alboran N | 4-6,6-7 |
| ITF M25 Klosters MD | 2021/06/24 13:05 | Erler/Neuchrist v Ehrat S / Wenger D | 6-3,6-4 |
| ITF M25 Klosters MD | 2021/06/22 12:05 | Erler/Neuchrist v Kym/Nikles | 6-3,6-4 |
| ITF M25 Biel MD | 2021/04/02 15:05 | Erler/Neuchrist v Paul J / Steinegger Y | 6-3,4-6,10-2 |
| ITF M25 Biel MD | 2021/04/02 12:00 | Andreev/Mochizuki v Erler/Neuchrist | 2-6,1-6 |
| ITF M25 Biel MD | 2021/04/01 14:15 | Erler/Neuchrist v Ehrat/Kym | 6-4,7-6 |
| ITF M25 Biel MD | 2021/03/30 12:50 | Erler/Neuchrist v Escoffier/Leshem | 6-1,6-2 |
| Challenger Salzburg MD | 2021/07/07 10:00 | Cornea/Merino v Doumbia/Reboul | 3-6,6-4,2-10 |
| Challenger Porto MD | 2021/07/01 14:55 | Doumbia/Reboul v Olivo/Reyes-Varela | 7-6,4-6,7-10 |
| Challenger Milan MD | 2021/06/25 12:00 | Doumbia/Reboul v Kopriva/Lehecka | 5-7,3-6 |
| Challenger Milan MD | 2021/06/24 10:00 | Passaro/Vanni v Doumbia/Reboul | 1-6,4-6 |
| Challenger Milan MD | 2021/06/23 09:00 | Galdos/Luz v Doumbia/Reboul | 3-6,6-3,6-10 |
| Challenger - Aix en Provence - Doubles Hommes | 2021/06/19 15:45 | Doumbia/Reboul v Galloway R / Lawson A | 6-7,7-5,10-4 |
| Challenger - Aix en Provence - Doubles Hommes | 2021/06/18 15:40 | Walkow S / Zielinski J v Doumbia/Reboul | 6-7,4-6 |
| Challenger - Aix en Provence - Doubles Hommes | 2021/06/16 10:30 | Doumbia/Reboul v Collarini/Olivo | 6-4,6-2 |