Round: 62 Ground: Hardcourt indoor
| ITF Turkey F38 | 2015/09/24 16:10 | Niesten, Miliaan v Keist, Luca | 6-1,6-3 |
| ITF Turkey F38 | 2015/09/20 12:00 | Shubladze, Vazha v Keist, Luca | 2-6,2-6 |
| ITF Switzerland F4 | 2015/08/26 12:30 | Keist, Luca v Perret, Loic | 2-6,3-6 |
| Turkey F15, Singles Qualifying | 2015/04/12 08:00 | Lang, Robin v Keist, Luca | 6-2,6-0 |
| Turkey F15, Singles Qualifying | 2015/04/11 07:00 | Chang, Jonathan v Keist, Luca | 7-6,5-7,3-6 |
| ITF Switzerland F2 Qual | 2015/03/15 09:00 | Mazzella, Manuel v Keist, Luca | 6-2,6-4 |
| ITF Switzerland F1 Qual | 2015/03/08 10:00 | Keist, Luca v Borter, Nico | 1-6,4-6 |
| ITF Switzerland F1 Qual | 2015/03/07 08:00 | Nicolas Parizzia v Keist, Luca | 4-6,4-6 |
| ITF Germany F14 | 2015/09/30 16:00 | Tom Schonenberg v Krstev, Ondrej | 6-3,6-2 |
| ITF Germany F14 | 2015/09/27 13:00 | Krstev, Ondrej v Gabriele Moghini | 6-1,6-2 |
| ITF Poland F5 | 2015/09/09 08:00 | Krstev, Ondrej v Fabian, Patrik | 2-6,6-3,2-6 |
| ITF Poland F5 | 2015/09/07 11:50 | Krstev, Ondrej v Onken, Julian | 6-2,5-7,6-3 |
| ITF Austria F6 | 2015/07/26 12:30 | Dittmer, Philipp v Krstev, Ondrej | 7-6,6-2 |
| ITF Austria F6 | 2015/07/25 14:00 | Zick, Charly v Krstev, Ondrej | 6-7,0-6 |
| ITF Czech Republic F6 | 2015/07/06 08:00 | Krstev, Ondrej v Vajda, Peter | 3-6,1-6 |
| Czech Republic F6, Singles Qualifying | 2015/07/04 11:00 | Krstev, Ondrej v Kekercheni, Filipp | 6-3,5-7,6-3 |