| ITF M15 Monastir | 2021/07/14 10:00 | Mark Mandlik v Matias Franco Descotte | 2-6,0-6 |
| ITF M15 Monastir | 2021/07/12 14:30 | Michael Zhu v Mark Mandlik | 6-4,2-6,1-10 |
| 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 |