Stadion: Court 2 Round: 25 Ground: Hardcourt indoor
| ITF - M15 - Parnu | 2021/10/26 08:00 | Tom Gentzsch v Oskar Antinheimo | 6-2,6-4 |
| ITF - M25 - Hamburg | 2021/10/19 09:25 | Daniel Little v Tom Gentzsch | 6-4,6-2 |
| UTR Pro Tennis Series - Mülheim | 2021/10/16 08:00 | Benjamin Hassan v Tom Gentzsch | 6-4,6-7,0-0 |
| UTR Pro Tennis Series - Mülheim | 2021/10/15 07:00 | Tom Gentzsch v Christian Hansen | 4-6,1-6 |
| UTR Pro Tennis Series - Mülheim | 2021/10/14 08:30 | Tom Gentzsch v Alen Moritz Hodzic | 4-6,6-2,5-4 |
| UTR Pro Tennis Series - Mülheim | 2021/10/13 11:30 | Quin Verstegen v Tom Gentzsch | 4-6,2-6 |
| UTR Pro Tennis Series - Mülheim | 2021/10/12 11:30 | Filip Duda v Tom Gentzsch | 6-4,5-2 |
| ITF - M25 - Eupen | 2021/09/07 10:05 | Guy Den Heijer v Tom Gentzsch | 6-3,6-4 |
| ITF - M15 - Kairo | 2021/09/13 08:00 | Valerio Aboian v Robertas Vrzesinski | 6-1,6-2 |
| ITF - M15 - Lodz | 2021/08/18 12:55 | Yann Wojcik v Robertas Vrzesinski | 6-1,6-3 |
| ITF - M15 - Lodz | 2021/08/16 08:00 | Piotr Pawlak v Robertas Vrzesinski | 0-6,2-6 |
| ITF - M15 - Xativa | 2021/08/03 07:00 | Inaki Montes-De La Torre v Robertas Vrzesinski | 6-0,6-3 |
| ITF - M15 - Xativa | 2021/08/02 07:00 | Adria V. Ferrer v Robertas Vrzesinski | 6-4,1-6,5-10 |
| ITF - M15 - Xativa | 2021/08/01 10:00 | Jesus Echevarri v Robertas Vrzesinski | 6-7,2-6 |
| ITF - M25 - Denia | 2021/07/26 08:00 | Robertas Vrzesinski v Zakhar Trapeznikov | 4-6,1-6 |
| ITF - M25 - Denia | 2021/07/25 08:00 | Robertas Vrzesinski v Areg Stepanian | 6-0,6-3 |