Stadium: Court 3 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Manacor | 2021/01/03 10:30 | Robert Strombachs v Adria V. Ferrer | 6-3,6-1 |
| German Championship | 2020/12/08 16:30 | Robert Strombachs v Henri Squire | 2-6,6-7 |
| ITF - M15 Heraklion | 2020/11/24 11:30 | Robert Strombachs v Matic Spec | 1-6,6-7 |
| ITF - M15 Heraklion | 2020/11/24 07:30 | Robert Strombachs v Jason Janis | 6-0,6-1 |
| ITF - M15 Heraklion | 2020/11/16 07:30 | Timo Stodder v Robert Strombachs | 6-1,6-1 |
| ITF M15 - Sarreguemines | 2020/10/29 11:05 | Kenneth Raisma v Robert Strombachs | 4-6,6-4,7-6 |
| ITF M15 - Sarreguemines | 2020/10/27 12:30 | Robert Strombachs v Patrik Niklas-Salminen | 6-4,7-6 |
| ITF M15 - Sarreguemines | 2020/10/26 13:15 | Robert Strombachs v Kenneth Raisma | 4-6,1-6 |
| ITF M15 Manacor | 2021/01/03 10:30 | Milo Gazivoda v Frane Nincevic | 6-7,2-6 |
| ITF M15 - Bratislava | 2020/11/25 11:55 | Marek Gengel v Frane Nincevic | 3-6,7-5,6-4 |
| ITF M15 - Bratislava | 2020/11/24 12:00 | Mihailo Popovic v Frane Nincevic | 3-6,6-3,4-10 |
| ITF M15 - Bratislava | 2020/11/23 14:00 | Dominique Graf v Frane Nincevic | 6-3,4-6,9-11 |
| ITF - M15 Heraklion | 2020/10/25 11:30 | Frane Nincevic v Robin Stanek | 1-6,6-3,4-10 |
| ITF - M15 Poreč | 2020/03/08 08:00 | Yan Bondarevskiy v Frane Nincevic | 6-0,6-0 |
| ITF - M15 Heraklion | 2020/02/17 11:00 | Frane Nincevic v Simon Beaupain | 6-2,5-7,1-10 |
| ITF - M15 Heraklion | 2020/02/16 11:00 | Lior Goldenberg v Frane Nincevic | 2-6,6-2,8-10 |