Stadium: Court 7 Round: 62 Ground: Hardcourt outdoor
| 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 |
| ITF M15 Monastir | 2021/06/14 13:30 | Kody Pearson v Perry Gregg | 6-3,7-6 |
| ITF M15 Monastir | 2021/06/14 09:00 | Perry Gregg v Valentino De Pellegrin | 6-3,6-3 |
| ITF M15 Monastir | 2021/06/13 09:00 | Perry Gregg v Nicolas Bruna | 6-3,2-6,19-17 |
| ITF M15 Monastir | 2021/06/01 12:50 | Lukas Neumayer v Perry Gregg | 6-4,6-2 |
| ITF M15 Monastir | 2021/05/24 13:30 | Yuta Kikuchi v Perry Gregg | 6-3,6-1 |
| 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 |
| International Tennis Series | 2020/06/11 12:45 | Mark Mandlik v Junior Alexander Ore | 6-3,1-6,8-10 |
| International Tennis Series | 2020/06/08 20:40 | Mark Mandlik v Tommaso Carnevale-Miino | 6-4,6-0 |
| International Tennis Series | 2020/06/08 13:20 | Mark Mandlik v Sam Lapides | 6-4,6-2 |