Stadium: Court 6 Round: 25 Ground: Hardcourt indoor
| ITF M15 Petrohrad | 2021/04/07 07:00 | Naoki Tajima v Alexey Zakharov | 3-6,6-1,3-6 |
| ITF M15 Monastir | 2021/03/04 11:15 | Naoki Tajima v Franco Agamenone | 0-6,3-6 |
| ITF M15 Monastir | 2021/03/03 13:20 | Stefano Reitano v Naoki Tajima | 1-6,0-6 |
| ITF M15 Monastir | 2021/02/23 08:00 | Alexis Gautier v Naoki Tajima | 7-5,6-4 |
| ITF M15 Monastir | 2021/02/18 11:00 | Naoki Tajima v Jose Fco. Vidal Azorin | 3-6,5-7 |
| ITF M15 Monastir | 2021/02/16 13:00 | Marvin Moeller v Naoki Tajima | 2-6,3-6 |
| ITF M15 Monastir | 2021/02/09 08:30 | Naoki Tajima v Naoki Nakagawa | 5-7,0-6 |
| ITF M15 Káhira | 2021/01/28 10:30 | Lenny Hampel v Naoki Tajima | 6-1,6-4 |
| ITF M15 Petrohrad | 2021/04/06 07:00 | Alexander Wolfschmidt v Aristarkh Safonov | 6-4,1-6,5-7 |
| ITF M25 Trimbach | 2021/03/08 15:35 | Alexander Wolfschmidt v Jan Sebesta | 2-6,4-6 |
| ITF M15 Petrohrad | 2021/02/10 12:15 | Jan Choinski v Alexander Wolfschmidt | 6-3,6-2 |
| ITF M15 Petrohrad | 2021/02/02 11:10 | Alexey Zakharov v Alexander Wolfschmidt | 6-1,6-2 |
| ITF M15 Manacor | 2021/01/10 09:30 | Milo Gazivoda v Alexander Wolfschmidt | 7-5,6-3 |
| ITF M15 Quinta Do Lago | 2020/11/02 10:00 | Alexander Wolfschmidt v Goncalo Falcao | 7-6,4-6,7-10 |
| ITF M15 Quinta Do Lago | 2020/11/01 14:00 | Alexander Wolfschmidt v Sizya Ernest Kivanda | 6-4,6-2 |
| ITF M25 Jablonec Nad Nisou | 2020/09/20 08:15 | Alexander Wolfschmidt v Filip Duda | 1-6,3-6 |