Stadium: Court 6 Round: 26 Ground: Clay
| Baja, Singles Qualifying M-ITF-HUN-03A | 2019/08/15 08:00 | Krstev, Ondrej v Dusan Obradovic | 6-1,6-4 |
| Wetzlar, Singles Qualifying M-ITF-GER-11A | 2019/08/07 13:45 | Santanna, B. v Krstev, Ondrej | 6-0,6-2 |
| Wetzlar, Singles Qualifying M-ITF-GER-11A | 2019/08/06 09:10 | Tabrizi, Keivon v Krstev, Ondrej | 4-6,0-6 |
| Piestany, Singles M-ITF-SVK-02A | 2019/07/16 13:15 | Vit Kopriva v Krstev, Ondrej | 6-3,6-1 |
| ITF M15 Marburg | 2019/07/11 15:00 | Krstev, Ondrej v Kai Wehnelt | 3-6,4-6 |
| ITF M15 Marburg | 2019/07/09 12:00 | Nikolay Vylegzhanin v Krstev, Ondrej | 6-7,6-7 |
| ITF M15 Wroclaw | 2019/07/03 08:00 | Krstev, Ondrej v Daniel Michalski | 4-6,2-6 |
| ITF M25 Pardubice | 2019/06/24 08:00 | Timo Stodder v Krstev, Ondrej | 6-2,6-3 |
| Baja, Singles Qualifying M-ITF-HUN-03A | 2019/08/14 16:25 | Aleksa Ciric v Szintai, David | 2-6,7-5,3-6 |
| ITF M15 Novi Sad | 2019/07/30 08:00 | Szintai, David v Hiramatsu, Shinnosuke | 6-2,3-6,11-9 |
| ITF M15 Novi Sad | 2019/07/29 08:00 | Szintai, David v Martin Zeljenka | 6-2,6-1 |
| Wels, Singles M-ITF-AUT-03A | 2019/07/24 14:25 | Szintai, David v Jirousek, Tomas | 6-7,1-6 |
| Wels, Singles M-ITF-AUT-03A | 2019/07/22 11:00 | Szintai, David v Lopez, Luis Humberto | 6-4,6-3 |
| Wels, Singles M-ITF-AUT-03A | 2019/07/22 07:30 | Szintai, David v Mrsic, Luka | 2-6,6-4,14-12 |
| Piestany, Singles M-ITF-SVK-02A | 2019/07/17 11:35 | Szintai, David v Fabian Marozsan | 3-6,3-6 |
| Piestany, Singles M-ITF-SVK-02A | 2019/07/16 07:00 | Szintai, David v Daniel Paty | 1-6,6-3,12-10 |