Stadium: Court 4 Round: 25 Ground: Hardcourt indoor
| ITF M15 Parnu | 2020/11/02 09:30 | Saar, Karl Kiur v Loncar, Stefan | 4-6,6-7 |
| ITF M15 Alkmaar | 2020/08/23 08:00 | Robert Strombachs v Loncar, Stefan | 6-4,6-0 |
| ITF - M15 Porec | 2020/03/10 11:10 | Jotovski, Tomislav v Loncar, Stefan | 6-1,6-2 |
| ITF - M15 Porec | 2020/03/09 10:30 | Loncar, Stefan v van Beem, Colin | 6-2,3-6,10-6 |
| ITF - M15 Porec | 2020/03/08 13:35 | Loncar, Stefan v Sodan, Ivan | 6-3,6-1 |
| ITF - M15 Antalya | 2020/02/16 09:30 | Loncar, Stefan v Andrea Fiorentini | 4-6,2-6 |
| ITF - M15 Antalya | 2020/02/11 08:30 | Tacchi, Luciano v Loncar, Stefan | 6-1,6-0 |
| ITF - M15 Monastir | 2019/12/16 08:00 | Ratsaratany, Loic v Loncar, Stefan | 6-4,6-2 |
| Sarreguemines, Singles M-ITF-FRA-22A | 2020/10/28 09:25 | Crepatte, Baptiste v Veldheer, Mick | 6-3,6-4 |
| ITF M25 Pardubice | 2020/09/30 12:45 | Jelle Sels v Veldheer, Mick | 7-6,6-1 |
| ITF M25 Pardubice | 2020/09/30 08:00 | Recek, Dominik v Veldheer, Mick | 6-4,3-6,12-14 |
| ITF M25 Pardubice | 2020/09/27 09:00 | Victor Sklenka v Veldheer, Mick | 1-6,2-6 |
| ITF M25 Jablonec Nad Nisou | 2020/09/21 10:30 | Veldheer, Mick v Papik, Tomas | 6-3,5-7,8-10 |
| ITF M25 Prague | 2020/09/13 14:15 | Stanek, Robin v Veldheer, Mick | 6-4,6-2 |
| ITF M15 Anif | 2020/08/26 08:00 | Veldheer, Mick v Thiago Agustin Tirante | 4-6,4-6 |
| Challenger Potchefstroom | 2020/03/11 09:25 | Veldheer, Mick v Hugo Grenier | 6-2,4-6,2-6 |