Stadium: Court 3 Round: 25 Ground: Clay
| ITF M15 Oldenzaal | 2021/08/20 13:15 | Mark Whitehouse v Damien Wenger | 6-7,2-6 |
| ITF M15 Oldenzaal | 2021/08/19 08:55 | Mark Whitehouse v Oscar Moraing | 4-6,6-3,6-3 |
| ITF M15 Oldenzaal | 2021/08/18 08:00 | Marvin Netuschil v Mark Whitehouse | 4-6,3-6 |
| ITF M15 Monastir | 2021/06/22 08:30 | Benjamin Winter Lopez v Mark Whitehouse | 7-6,6-3 |
| Challenger Nottingham Qual | 2021/06/13 12:00 | Zhizhen Zhang v Mark Whitehouse | 6-4,7-6 |
| ITF M15 Heraklion | 2021/06/01 10:30 | Mark Whitehouse v Daniel Little | 4-6,1-6 |
| ITF M15 Heraklion | 2021/05/25 08:00 | Mark Whitehouse v Petros Chrysochos | 5-7,4-6 |
| ITF M15 Heraklion | 2021/05/19 09:45 | Takuto Niki v Mark Whitehouse | 6-3,6-3 |
| ITF M15 Allershausen | 2021/08/31 08:00 | William Ma v Joel Vincent Link | 6-2,6-3 |
| ITF M15 Allershausen | 2021/08/30 09:30 | William Ma v Julian Peter | 6-1,6-1 |
| ITF M25 Trier | 2021/08/23 11:30 | William Ma v Amaury Raynel | 4-6,2-6 |
| ITF M25 Ueberlingen | 2021/08/16 12:30 | William Ma v Jimmy Yang | 1-6,4-6 |
| ITF M25 Frankfurt am Main | 2021/08/09 10:35 | William Ma v Yan Sabanin | 3-6,3-6 |
| ITF M25 Wetzlar | 2021/08/02 14:35 | Benito Sanchez Martinez v William Ma | 6-3,1-6,11-9 |
| ITF M25 Kottingbrunn | 2021/07/18 07:30 | Benedikt Emesz v William Ma | 6-1,6-0 |
| UTR Pro Tennis Series Canberra | 2021/04/24 00:00 | Omar Jasika v William Ma | 6-3,5-2 |