Stadium: VOLKSBANK Court Round: 54 Ground: Clay
| ITF - M25 Frankfurt nad Mohanom | 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 |
| UTR Pro Tennis Series Canberra | 2021/04/21 01:30 | William Ma v Li Tu | 2-6,3-6 |
| UTR Pro Tennis Series Canberra | 2021/04/20 01:30 | William Ma v Arjun Mehrotra | 6-3,4-6,7-6 |
| UTR Pro Tennis Series Canberra | 2021/04/19 01:00 | James McCabe v William Ma | 6-3,6-3 |
| UTR - Pro Tennis Series - Bendigo | 2021/01/31 03:00 | William Ma v Chanchai Sookton-Eng | 1-6,2-5 |
| ITF - M15 Heraklion | 2021/06/06 07:30 | Jimmy Yang v Matas Vasiliauskas | 1-6,7-5,4-10 |
| ITF - M15 Heraklion | 2021/05/30 06:30 | Mattia Bellucci v Jimmy Yang | 6-2,7-6 |
| ITF - M15 Heraklion | 2021/05/23 08:30 | Jimmy Yang v William Griffith | 2-6,0-6 |
| ITF - M15 Heraklion | 2021/05/17 07:00 | Reese Stalder v Jimmy Yang | 6-2,6-3 |
| ITF - M25 Meerbusch | 2021/04/12 07:30 | Jimmy Yang v Jim Walder | 2-6,3-6 |