| 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 | |
| ITF M15 Vale Do Lobo | 02/18 15:30 | 45 | Constantin Schmitz v Vullnet Tashi | 4-6,6-4,11-13 | |
| ITF M15 Kaarst | 02/08 16:05 | 27 | Robin Stanek v Constantin Schmitz | 6-0,6-4 | |
| ITF M15 Kaarst | 02/07 13:00 | 26 | Petr Nouza v Constantin Schmitz | 4-6,6-1,3-6 | |
| ITF M15 Kaarst | 02/06 16:50 | 25 | Constantin Schmitz v Dominik Boehler | Retired | |
| ITF M15 Monastir | 01/17 08:00 | 26 | Maxime Pauwels v Constantin Schmitz | Retired | |
| ITF M15 Monastir | 01/16 09:15 | 25 | Constantin Schmitz v Maksim Tikhomirov | 6-3,6-2 | |
| ITF M15 Monastir | 01/14 12:00 | 45 | Constantin Schmitz v Mattia Bellucci | 6-2,6-0 | |
| ITF M15 Monastir | 01/14 08:00 | 45 | Constantin Schmitz v Mathieu Garcia | 6-1,6-2 | |
| ITF Qatar F6 | 12/20 12:00 | 27 | Constantin Schmitz v Lorenzo Frigerio | 3-6,1-6 | |
| ITF Qatar F6 | 12/19 12:00 | 26 | Constantin Schmitz v Florian Lakat | Retired | |
| ITF Qatar F6 | 12/18 09:05 | 25 | Goncalo Oliveira v Constantin Schmitz | 4-6,3-6 | |
| ITF Qatar F6 | 12/17 10:00 | 44 | Constantin Schmitz v Bart Van Den Berg | 6-3,6-3 | |
| ITF Qatar F6 | 12/16 17:35 | 44 | Constantin Schmitz v Eric Lavaud | Walkover | |
| ITF Qatar F5 | 12/10 13:40 | 44 | Peter Kobelt v Constantin Schmitz | 6-2,6-7,6-1 | |
| ITF Qatar F5 | 12/09 12:00 | 44 | Ivailo Keremedchiev v Constantin Schmitz | 6-7,4-6 |