Stadium: Court 1 Round: 54 Ground: Hardcourt indoor
| UTR Pro Tennis Series Copenhagen | 2021/06/19 11:30 | Gustav Theilgaard v Hugo Pierre | 6-4,7-5 |
| UTR Pro Tennis Series Copenhagen | 2021/06/18 11:00 | Hugo Pierre v Carl Emil Overbeck | 2-6,2-6 |
| UTR Pro Tennis Series Copenhagen | 2021/06/16 11:00 | Hugo Pierre v Simon Yitbarek | 6-3,1-6,7-5 |
| UTR Pro Tennis Series Copenhagen | 2021/06/15 09:30 | Hugo Pierre v Mick Lescure | 6-2,5-7,3-5 |
| UTR Pro Tennis Series Copenhagen | 2021/06/14 12:30 | David Norfeldt v Hugo Pierre | 6-7,3-6 |
| UTR Pro Tennis Series Bucharest | 2021/06/03 10:30 | Vladislav Melnic v Hugo Pierre | 6-4,6-2 |
| UTR Pro Tennis Series Bucharest | 2021/06/02 17:30 | Juan Ignacio Galarza v Hugo Pierre | 6-4,5-3 |
| UTR Pro Tennis Series Bucharest | 2021/05/30 11:30 | Hugo Pierre v Stefan Palosi | 3-6,0-6 |
| ITF M25 Eupen | 2021/09/06 15:05 | Lennart Melzer v Marcel Hornung | 1-6,1-6 |
| ITF M25 Eupen | 2021/09/05 13:30 | Marc Schmidt v Lennart Melzer | 0-6,0-6 |
| ITF M25 Sierre | 2021/08/29 08:30 | Bastien Rieme v Lennart Melzer | 3-6,6-1,10-4 |
| ITF M25 Trier | 2021/08/23 10:30 | Leopold Zima v Lennart Melzer | 6-1,6-1 |
| ITF M25 Koksijde | 2021/08/15 11:40 | Lennart Melzer v Tom Clavel | 3-6,6-4,8-10 |
| ITF M15 Esch/Alzette | 2021/07/18 09:45 | Lennart Melzer v Andreja Petrovic | 3-6,0-6 |
| ITF M25 Bourg-en-Bresse | 2021/06/27 12:50 | Damien Wenger v Lennart Melzer | 6-1,6-0 |
| ITF M25 La Nucia | 2021/03/14 08:00 | Jorge Martinez Martinez v Lennart Melzer | 6-0,6-1 |