Stadium: A Round: 44 Ground: Carpet indoor
| ITF Egypt F2 | 2018/01/24 09:40 | Johannes Haerteis v Youssef Hossam | 6-7,4-6 |
| ITF Egypt F2 | 2018/01/22 08:00 | Hugo Pierre v Johannes Haerteis | 6-7,1-6 |
| ITF Egypt F2 | 2018/01/21 10:00 | Vinayak Sharma Kaza v Johannes Haerteis | 3-6,2-6 |
| ITF Egypt F2 | 2018/01/20 08:00 | Ilco Van Buuren v Johannes Haerteis | 3-6,2-6 |
| ITF Egypt F1 | 2018/01/15 10:00 | Johannes Haerteis v Fabian Marozsan | 2-6,4-6 |
| ITF Egypt F1 | 2018/01/14 08:00 | Johannes Haerteis v Jannik Sinner | 6-3,5-7,7-5 |
| Challenger Eckental Qual | 2017/10/28 09:00 | Evan Furness v Johannes Haerteis | 3-6,7-6,7-6 |
| ITF Czech Republic F7 | 2017/10/25 08:00 | Danylo Kalenichenko v Johannes Haerteis | 6-4,6-2 |
| ITF Switzerland F1 Qual | 2018/02/04 09:00 | Giordan Kunz v Leon Hoeveler | 6-3,7-6 |
| ITF Italy F34 Qual | 2017/10/14 13:00 | Giordan Kunz v Neven Krivokuca | 0-6,0-6 |
| ITF Italy F33 Qual | 2017/10/08 13:00 | Giordan Kunz v Milos Nikolic | 5-7,4-6 |
| ITF Germany F12 | 2017/08/21 08:00 | Giordan Kunz v Joel Vincent Link | 0-6,1-6 |
| ITF Greece F5 | 2017/04/02 06:30 | Fran Zvonimir Zgombic v Giordan Kunz | 7-5,4-6,6-1 |
| ITF Greece F5 | 2017/04/01 06:30 | Giordan Kunz v Taylor Witt | 6-3,6-4 |
| ITF Greece F4 | 2017/03/26 10:00 | Ben Jones v Giordan Kunz | 7-6,6-2 |
| ITF Switzerland F5 Qual | 2016/08/28 12:20 | Oliver Mrose v Giordan Kunz | 4-6,6-3,6-4 |