Stadium: Court 6 Round: 62 Ground: Clay
| ITF M25 Kottingbrunn | 2021/07/18 07:30 | Laurin Aerne v Jan Jermar | 1-6,2-6 |
| ITF M25 Telfs | 2021/07/12 07:50 | Neil Oberleitner v Jan Jermar | 6-3,6-0 |
| ITF M15 Poprad | 2021/07/07 10:10 | Luca Castelnuovo v Jan Jermar | 7-6,6-2 |
| ITF M25 Most | 2021/05/24 08:00 | Beran, Jakub v Jan Jermar | 6-4,6-7,10-3 |
| ITF M25 Jablonec Nad Nisou | 2021/05/17 07:30 | Jan Jermar v Kai Lemstra | 4-6,4-6 |
| ITF M25 Jablonec Nad Nisou | 2021/05/16 08:30 | Jan Jermar v Samosi, Peter | 7-6,6-0 |
| ITF M25 Prague | 2021/05/09 10:00 | Ondrej Horak v Jan Jermar | 7-6,6-3 |
| ITF M15 Las Palmas | 2021/04/25 11:00 | Jan Jermar v Gabarro, Xavier | 0-6,2-6 |
| ITF M25 Kottingbrunn | 2021/07/18 07:30 | Tomas Lanik v Vittar, Francisco | 4-6,2-6 |
| ITF M25 Telfs | 2021/07/14 08:50 | Vittar, Francisco v Sandro Kopp | 2-6,3-6 |
| ITF M25 Telfs | 2021/07/13 09:10 | Heger, Tim v Vittar, Francisco | 5-7,6-3,7-10 |
| ITF M25 Telfs | 2021/07/12 10:35 | Jesse De Jager v Vittar, Francisco | 1-6,6-2,8-10 |
| ITF M25 Velenje | 2021/07/04 07:30 | Constantin Bittoun Kouzmine v Vittar, Francisco | 7-5,6-1 |
| ITF M15 Austin | 2019/11/20 21:50 | Vittar, Francisco v Jacob Fearnley | 4-6,3-6 |
| ITF M15 Austin | 2019/11/19 16:00 | Vittar, Francisco v Ravichander, Ishaan | 6-2,6-2 |
| Buenos Aires, Singles Qualifying M-ITF-ARG-22A | 2019/07/11 14:55 | Estevez Maximiliano v Vittar, Francisco | 6-3,6-1 |