Stadium: Court 7 Round: 62 Ground: Clay
| ITF M15 Novi Sad | 2021/07/28 11:15 | Lazar Milicevic v Marko Miladinovic | 3-6,6-1,3-6 |
| ITF M15 Novi Sad | 2021/07/27 09:40 | Matic Dimic v Lazar Milicevic | 7-6,2-6,8-10 |
| ITF M15 Novi Sad | 2021/07/26 07:30 | Franco Roncadelli v Lazar Milicevic | 7-6,4-6,5-10 |
| ITF M15 Novi Sad | 2021/07/25 09:30 | Lazar Milicevic v Domagoj Biljesko | 6-2,6-3 |
| ITF M25 Belgrade | 2021/06/30 14:05 | Lazar Milicevic v Mirko Martinez | 5-7,7-5,2-6 |
| ITF M15 Skopje | 2021/05/31 08:00 | Niels Visker v Lazar Milicevic | 6-7,6-3,12-10 |
| ITF M15 Skopje | 2021/05/30 07:00 | Lazar Milicevic v Strahinja Rakic | 5-7,6-0,10-4 |
| ITF M15 Brcko | 2021/05/21 09:25 | Matheus Pucinelli De Almeida v Lazar Milicevic | 7-5,7-5 |
| ITF M15 Heraklion | 2021/11/08 09:00 | Jannik Maute v Tim Heger | 4-6,6-3,15-13 |
| ITF M15 Heraklion | 2021/11/04 08:30 | Tim Heger v Kyle Seelig | 6-4,4-6,5-7 |
| ITF M15 Heraklion | 2021/11/03 12:40 | Tim Heger v Raffael Schaer | 6-3,6-4 |
| ITF M25 Quinta Do Lago | 2021/10/19 10:30 | Harry Wendelken v Tim Heger | 6-1,4-6,10-8 |
| ITF M25 Quinta Do Lago | 2021/10/18 14:05 | Illia Stoliar v Tim Heger | 2-6,0-6 |
| ITF M25 Loule | 2021/10/12 11:00 | Tim Heger v Miguel Gomes | 3-6,0-6 |
| ITF M25 Loule | 2021/10/11 13:30 | Tim Heger v Lennart Melzer | 6-1,6-2 |
| ITF M25 Setubal | 2021/10/06 10:00 | Tim Heger v Henrique Rocha | 2-6,6-4,2-6 |