| ITF M15 Tabarka | 05/17 09:00 | 27 | Aziz Dougaz v Constantin Schmitz | 7-6,6-1 | |
| ITF M15 Tabarka | 05/16 12:55 | 26 | Alessandro Ingarao v Constantin Schmitz | 2-6,1-6 | |
| ITF M15 Tabarka | 05/15 08:00 | 25 | Hugo Schott v Constantin Schmitz | 1-6,4-6 | |
| ITF M15 Troisdorf | 05/10 10:15 | 28 | Constantin Schmitz v Kacper Zuk | 4-6,2-6 | |
| ITF M15 Troisdorf | 05/09 11:20 | 27 | Daniel De Jonge v Constantin Schmitz | 3-6,1-6 | |
| ITF M15 Troisdorf | 05/09 08:00 | 26 | Kai Wehnelt v Constantin Schmitz | 2-6,2-6 | |
| ITF M15 Troisdorf | 05/07 08:00 | 25 | Constantin Schmitz v Tomas Lipovsek Puches | 6-2,6-3 | |
| ITF M15 Tabarka | 04/26 11:45 | 27 | Constantin Schmitz v Geoffrey Blancaneaux | 5-7,0-6 | |
| ITF M15 Tabarka | 04/25 09:00 | 26 | Constantin Schmitz v Kristjan Tamm | 6-2,6-2 | |
| ITF M15 Tabarka | 04/24 08:30 | 25 | Constantin Schmitz v Boris Fassbender | 6-0,6-0 | |
| ITF M15 Tabarka | 04/20 09:00 | 28 | Javier B-Cosano v Constantin Schmitz | 6-4,7-5 | |
| ITF M15 Tabarka | 04/19 09:00 | 27 | Nik Razborsek v Constantin Schmitz | 0-6,2-6 | |
| ITF M15 Tabarka | 04/18 08:30 | 26 | Anas Fattar v Constantin Schmitz | 3-6,1-6 | |
| ITF M15 Tabarka | 04/16 08:40 | 25 | Constantin Schmitz v Maxime Tchoutakian | 6-3,6-3 | |
| ITF M15 Tabarka | 04/10 08:30 | 25 | Constantin Schmitz v Corentin Denolly | 6-7,3-6 | |
| ITF M15 Rovinj | 03/24 10:00 | 29 | Jeroen Vanneste v Constantin Schmitz | 2-6,4-6 | |
| ITF M15 Rovinj | 03/23 10:50 | 28 | Luca Giacomini v Constantin Schmitz | 3-6,0-6 | |
| ITF M15 Rovinj | 03/22 09:00 | 27 | Constantin Schmitz v Peter Nagy | 0-6,6-2,6-0 | |
| ITF M15 Rovinj | 03/21 09:00 | 26 | Pavel Nejedly v Constantin Schmitz | Retired | |
| ITF M15 Rovinj | 03/20 11:55 | 25 | Constantin Schmitz v Gabor Borsos | 6-3,6-4 | |
| ITF M15 Rovinj | 03/20 11:48 | - | Constantin Schmitz v Gabor Borsos | 6-3,5-4 | |
| ITF M15 Porec | 03/16 09:00 | 28 | Constantin Schmitz v Maxime Chazal | 2-6,4-6 | |
| ITF M15 Porec | 03/15 09:10 | 27 | Constantin Schmitz v Andrea Basso | 7-5,7-6 | |
| ITF M15 Porec | 03/14 09:00 | 26 | Antoine C Chauvinc v Constantin Schmitz | 6-3,5-7,3-6 | |
| ITF M15 Porec | 03/13 09:00 | 25 | Zvonimir Oreskovic v Constantin Schmitz | Retired | |
| ITF M15 Porec | 03/12 09:00 | 45 | Constantin Schmitz v Francesco Bessire | 6-1,6-1 | |
| ITF M15 Porec | 03/11 11:35 | 45 | Constantin Schmitz v Johannes Bangratz | 6-2,6-1 | |
| ITF M15 Faro | 02/27 10:00 | 25 | Alvaro L S Martin v Constantin Schmitz | 6-4,6-0 | |
| ITF M15 Faro | 02/26 10:10 | 45 | Constantin Schmitz v Jonathan Gray | 6-2,6-2 | |
| ITF M15 Faro | 02/25 12:25 | 45 | Constantin Schmitz v Omar Giacalone | 6-1,6-3 |