Stadium: Clay 4 Round: 25 Ground: Clay
| ITF - M15 Antalya | 2019/09/19 08:55 | Michael Vrbensky v Gelhardt, Luca | 4-6,6-2,6-0 |
| ITF - M15 Antalya | 2019/09/17 08:00 | Gelhardt, Luca v Smola, Maciej | 6-4,6-3 |
| Varna, Singles M-ITF-BUL-04A | 2019/09/12 09:20 | Gelhardt, Luca v Ivanov, Simon Anthony | 3-6,1-6 |
| Varna, Singles M-ITF-BUL-04A | 2019/09/11 07:00 | Durguti, Besir v Gelhardt, Luca | 1-6,4-6 |
| ITF M15 Eupen | 2019/08/06 10:25 | Max Houkes v Gelhardt, Luca | 5-7,7-6,10-8 |
| ITF M15 Eupen | 2019/08/05 15:00 | Duquesne, Goran v Gelhardt, Luca | 0-6,3-6 |
| Brussels, Singles M-ITF-BEL-03A | 2019/07/29 12:50 | Admiraal, Amadatus v Gelhardt, Luca | 6-2,6-3 |
| Bad Schussenried, Singles Qualifying M-ITF-GER-10A | 2019/07/24 14:00 | Gelhardt, Luca v Netuschil, Marvin | 6-7,4-6 |
| Coupe Davis | 2019/09/14 08:25 | Lloyd Harris v Dimitar Kuzmanov | 6-3,7-6 |
| Coupe Davis | 2019/09/13 12:05 | Roelofse, Ruan v Dimitar Kuzmanov | 5-7,5-7 |
| Challenger Tampere | 2019/07/22 12:30 | Dimitar Kuzmanov v Andrea Pellegrino | 4-6,6-3,7-5 |
| Challenger Amersfoort | 2019/07/16 14:25 | Dimitar Kuzmanov v Kimmer Coppejans | 3-6,6-1,1-6 |
| Challenger Amersfoort | 2019/07/15 08:00 | Geoffrey Blancaneaux v Dimitar Kuzmanov | 5-7,1-6 |
| Cuneo, Singles Qualifying M-ITF-ITA-12A | 2019/07/05 10:30 | Gijs Brouwer v Dimitar Kuzmanov | 6-7,6-4,6-2 |
| Cuneo, Singles Qualifying M-ITF-ITA-12A | 2019/07/04 09:30 | Remy Bertola v Dimitar Kuzmanov | 2-6,0-6 |
| Milan, Italy | 2019/06/26 13:10 | Balzerani, Riccardo v Dimitar Kuzmanov | 2-6,6-2,6-3 |