Stadium: Center Court Round: 25 Ground: Clay
| ITF Bosnia and Herzegovina F2 | 2018/05/23 08:00 | Alexandros Skorilas v Hirschmueller, Christian | 6-2,6-3 |
| ITF Bosnia and Herzegovina F1 | 2018/05/17 08:00 | Hirschmueller, Christian v Jotovski, Tomislav | 3-6,3-6 |
| ITF Bosnia and Herzegovina F1 | 2018/05/16 09:00 | Hirschmueller, Christian v Wang, Guan Kai | 6-3,6-3 |
| ITF Sweden F1 | 2018/05/08 13:40 | Hirschmueller, Christian v Lucas Renard | 0-6,3-6 |
| ITF Egypt F16 | 2018/05/02 15:00 | Hirschmueller, Christian v Niels Lootsma | 1-6,6-3,4-6 |
| Egypt F15, Singles Qualifying | 2018/04/25 08:00 | Zhurbin, Alexander v Hirschmueller, Christian | 7-5,6-1 |
| Egypt F14, Singles Qualifying | 2018/04/17 08:00 | Hirschmueller, Christian v Hoyt, Evan | 4-6,6-4,1-6 |
| ITF Egypt F13 | 2018/04/12 09:30 | Hirschmueller, Christian v Lucas Miedler | 1-6,3-6 |
| ITF Italy F13 | 2018/06/04 11:00 | Stefanini, Jacopo v Marvin Moeller | 4-6,7-6,6-4 |
| Challenger Heilbronn | 2018/05/15 13:50 | Marvin Moeller v Jiri Vesely | 2-6,2-6 |
| France F5, Singles | 2018/03/14 12:00 | Marvin Moeller v Botic Van De Zandschulp | 3-6,3-6 |
| France F5, Singles | 2018/03/12 16:30 | Roumane, Rayane v Marvin Moeller | 6-3,4-6,1-6 |
| ITF Germany F3 | 2018/02/04 12:00 | Igor Sijsling v Marvin Moeller | 6-2,7-6 |
| ITF Germany F3 | 2018/02/03 12:00 | Marvin Moeller v Boltz, Sebastien | 6-4,6-4 |
| ITF Germany F3 | 2018/02/02 17:00 | Marvin Moeller v Torebko, Peter | 1-6,6-4,6-2 |
| ITF Germany F3 | 2018/02/01 20:05 | Reuter, Yannik v Marvin Moeller | 3-6,1-6 |