Stadium: Court 5 Round: 62 Ground: Hardcourt outdoor
| ITF - M15 Monastir | 2021/07/12 09:00 | Michael Zhu v Tobias Kirchlechner | 6-3,6-2 |
| ITF - M25 Weston | 2021/06/28 19:00 | Cooper Williams v Michael Zhu | 6-2,7-6 |
| ITF - M15 Marbella | 2021/05/25 09:00 | Michael Zhu v Miles Jones | 2-6,3-6 |
| ITF - M15 Marbella | 2021/05/24 08:00 | Michael Zhu v Mikel Martinez | 7-6,3-6,10-3 |
| ITF - M15 Marbella | 2021/05/23 07:00 | Michael Zhu v Illia Stoliar | 6-1,6-4 |
| ITF - M15 Valldoreix | 2021/05/09 13:00 | Facundo Juarez v Michael Zhu | 4-6,6-2,10-6 |
| ITF - M15 Majadahonda | 2021/05/02 12:00 | Luis Diego Chavez Villalpando v Michael Zhu | 3-6,6-4,10-5 |
| ITF - M25 Reus | 2021/04/11 07:00 | Michael Zhu v Rishab Agarwal | 2-6,6-4,8-10 |
| ITF - M15 Monastir | 2021/07/12 09:00 | Mark Mandlik v Adam Jones | 6-1,4-6,11-9 |
| ITF - M15 Monastir | 2021/07/11 09:00 | Mark Mandlik v Liova Ajavon | 6-7,7-5,10-2 |
| ITF - M15 Monastir | 2021/07/05 14:00 | Mark Mandlik v Perry Gregg | 4-6,3-6 |
| ITF - M15 Monastir | 2021/07/05 09:00 | Kousuke Ogura v Mark Mandlik | 6-7,1-6 |
| ITF - M15 Monastir | 2021/07/04 10:00 | Mark Mandlik v Ivan Dikenstein | 6-1,6-0 |
| ITF - M15 Monastir | 2021/06/27 09:00 | Perry Gregg v Mark Mandlik | 6-4,2-6,10-5 |
| ITF - M25 Wichita | 2021/06/08 16:45 | Mark Mandlik v Gabriel Diallo | 2-6,7-6,9-11 |
| ITF - M25 Wichita | 2021/06/07 15:00 | Charles Broom v Mark Mandlik | 5-7,4-6 |