Stadium: Centre Court Round: 19 Ground: Clay
| ITF M25 Porto | 2020/10/01 14:35 | Kelly, Dayne v Matteo Martineau | 6-3,6-1 |
| Luedenscheid, Germany | 2021/08/15 09:30 | Robert, Stephane v Kelly, Dayne | 2-6,2-6 |
| ITF M25 Wetzlar | 2021/08/05 13:55 | Kelly, Dayne v Schmitz, Constantin | 2-6,1-6 |
| ITF M25 Wetzlar | 2021/08/04 09:55 | Kelly, Dayne v Hidalgo, Gabriel Alejandro | 6-7,6-2,6-4 |
| Braunchsweig, Germany | 2021/07/06 10:30 | Benjamin Hassan v Kelly, Dayne | 6-4,7-6 |
| Braunchsweig, Germany | 2021/07/05 09:30 | Hidalgo, Diego v Kelly, Dayne | 3-6,7-6,3-6 |
| ITF M25 The Hague | 2021/07/01 14:05 | Kelly, Dayne v Tepavac, Marko | 6-7,3-6 |
| ITF M25 The Hague | 2021/06/29 15:00 | Kelly, Dayne v Guy Den Heijer | 6-1,6-4 |
| ITF M25 Montauban | 2021/06/24 10:00 | Valentin Royer v Kelly, Dayne | 7-6,6-2 |
| Luedenscheid, Germany | 2021/08/15 11:00 | Matteo Martineau v Adrian Andreev | 6-4,7-5 |
| San Marino, San Marino | 2021/08/08 08:00 | Manuel Mazza v Matteo Martineau | 6-1,3-6,6-3 |
| Challenger Pozoblanco | 2021/07/20 15:00 | Matteo Martineau v Gabashvili, Teimuraz | 4-6,6-1,4-6 |
| Challenger Pozoblanco | 2021/07/19 15:00 | Matteo Martineau v Federico Zeballos | 6-2,6-3 |
| Challenger Pozoblanco | 2021/07/18 15:30 | Matteo Martineau v Antonio Prat | 6-0,6-7,6-2 |
| Iasi, Romania | 2021/07/11 07:00 | Matteo Martineau v Vlad Andrei Dancu | 3-6,6-7 |
| ITF M25 Bourg-en-Bresse | 2021/07/03 15:30 | Franco Agamenone v Matteo Martineau | 6-4,2-6,6-4 |
| ITF M25 Bourg-en-Bresse | 2021/07/02 10:00 | Jakub Paul v Matteo Martineau | 4-6,6-7 |