Estadio: Court 6 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Monastir | 2021/06/27 09:00 | Perry Gregg v Mark Mandlik | 6-4,2-6,10-5 |
| 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 |
| ITF M25 Santo Domingo | 2021/05/31 13:00 | Mark Mandlik v Sergio Luis H Ramirez | 6-4,5-7,6-10 |
| ITF M25 Santo Domingo | 2021/05/30 15:30 | Edward Lewis v Mark Mandlik | 0-6,1-6 |
| International Tennis Series | 2020/06/11 14:25 | Mark Mandlik v Tommaso Carnevale-Miino | 6-3,6-4 |
| ITF M15 Monastir | 2021/07/05 09:00 | Connor Di Marco v Perry Gregg | 4-6,4-6 |
| ITF M15 Monastir | 2021/06/30 13:00 | Alejo Lorenzo Lingua Lavallen v Perry Gregg | 6-4,6-4 |
| ITF M15 Monastir | 2021/06/28 13:00 | Perry Gregg v Keenan Mayo | 6-3,6-7,10-6 |
| ITF M15 Monastir | 2021/06/28 08:00 | Noah Lopez v Perry Gregg | 6-3,4-6,6-10 |
| ITF M15 Monastir | 2021/06/27 09:00 | Perry Gregg v Mark Mandlik | 6-4,2-6,10-5 |
| ITF M15 Monastir | 2021/06/21 13:30 | Miles Jones v Perry Gregg | 6-3,6-4 |
| ITF M15 Monastir | 2021/06/21 09:00 | Perry Gregg v Alec Beckley | 6-1,7-6 |
| ITF M15 Monastir | 2021/06/20 09:00 | Perry Gregg v Giacomo Revelli | 7-6,3-6,10-8 |