Stadium: Court 5 Round: 25 Ground: Clay
| 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 Brcko | 2021/05/18 12:00 | Lazar Milicevic v Dusan Rajic | 7-6,6-4 |
| ITF M15 Sofia | 2021/07/07 10:45 | Simon A Ivanov v Marko Miladinovic | 7-5,6-1 |
| ITF M25 Belgrade | 2021/06/30 09:00 | Marko Miladinovic v Gorazd Srbljak | 3-6,4-6 |
| ITF M15 Skopje | 2021/06/09 09:10 | Ronan Joncour v Marko Miladinovic | 7-6,6-4 |
| ITF M15 Skopje | 2021/06/02 13:20 | Marko Miladinovic v Oscar Moraing | 6-7,0-6 |
| ITF M15 Prijedor | 2021/05/13 10:05 | Peter Fajta v Marko Miladinovic | 5-7,6-3,7-6 |
| ATP Belgrade | 2021/04/18 13:30 | Marko Miladinovic v Taro Daniel | 1-6,2-6 |
| Challenger Belgrade | 2021/04/12 10:00 | Taro Daniel v Marko Miladinovic | 6-1,7-5 |
| ITF M15 Antalya | 2021/03/24 07:30 | Seong Chan Hong v Marko Miladinovic | 6-2,6-4 |