Stadium: Court 1 Round: 14 Ground: Hardcourt indoor
| Challenger Lexington | 2021/07/25 15:00 | Oliver Crawford v Aleksandar Kovacevic | 7-6,7-5 |
| Challenger Cary | 2021/07/20 17:50 | Ramkumar Ramanathan v Aleksandar Kovacevic | 6-4,5-7,6-4 |
| Challenger Cary | 2021/07/19 16:00 | Aleksandar Kovacevic v Ben Shelton | 6-3,6-4 |
| Challenger Cary | 2021/07/18 18:20 | Aleksandar Kovacevic v Dennis Novikov | 7-6,7-6 |
| Challenger Little Rock | 2021/05/30 19:40 | Strong Kirchheimer v Aleksandar Kovacevic | 6-4,6-7,7-6 |
| Challenger Tallahassee | 2021/04/18 19:30 | Aleksandar Kovacevic v Filip Cristian Jianu | 4-6,7-5,6-7 |
| Challenger Orlando | 2021/04/15 14:00 | Aleksandar Kovacevic v Christian Harrison | 4-6,3-6 |
| Challenger Orlando | 2021/04/13 17:50 | Aleksandar Kovacevic v Roberto Quiroz | 6-1,5-7,6-4 |
| ITF M15 Monastir | 2021/07/04 08:00 | Seong Chan Hong v Luca Giacomini | 7-5,6-3 |
| ITF M15 Monastir | 2021/07/03 08:30 | Moez Echargui v Seong Chan Hong | 3-6,0-6 |
| ITF M15 Monastir | 2021/07/02 08:30 | Seong Chan Hong v Hady Habib | 6-2,6-2 |
| ITF M15 Monastir | 2021/07/01 08:30 | Seong Chan Hong v Samuel Vincent Ruggeri | 6-1,6-1 |
| ITF M15 Monastir | 2021/06/23 13:10 | Seong Chan Hong v Terence Atmane | 4-6,4-6 |
| ITF M15 Monastir | 2021/06/15 08:30 | Luciano Darderi v Seong Chan Hong | 6-4,6-4 |
| ITF M15 Monastir | 2021/06/11 08:30 | Guy Orly Iradukunda v Seong Chan Hong | 6-4,6-4 |
| ITF M15 Monastir | 2021/06/08 08:30 | Emil Reinberg v Seong Chan Hong | 1-6,2-6 |