Stadium: Court 4 Round: 26 Ground: Clay
| ITF Romania F13 | 2018/09/11 06:30 | Johannes Haerteis v Gabi Adrian Boitan | 6-3,6-2 |
| ITF Germany F13 | 2018/08/23 08:00 | Peter Heller v Johannes Haerteis | 6-1,6-0 |
| ITF Germany F13 | 2018/08/21 15:00 | Florian Fallert v Johannes Haerteis | 2-6,3-6 |
| Challenger Pullach Qual | 2018/08/04 15:55 | Alexandre Muller v Johannes Haerteis | 7-6,7-5 |
| Challenger Sopot Qual | 2018/07/29 09:00 | Roberto Marcora v Johannes Haerteis | 6-4,7-5 |
| Challenger Sopot Qual | 2018/07/28 10:40 | Johannes Haerteis v Kamil Gajewski | 6-3,6-2 |
| ITF Austria F3 | 2018/07/19 15:00 | Johannes Haerteis v Nerman Fatic | 2-6,6-7 |
| ITF Austria F3 | 2018/07/18 09:30 | Mariano Kestelboim v Johannes Haerteis | 2-6,7-5,2-6 |
| ITF Romania F13 | 2018/09/12 07:25 | Gabriel Alejandro Hidalgo v Petru-Alexandru Luncanu | 6-2,6-2 |
| ITF Romania F12 | 2018/09/07 07:00 | Vasile Antonescu v Gabriel Alejandro Hidalgo | 7-6,4-6,6-3 |
| ITF Romania F12 | 2018/09/04 07:00 | Gabriel Alejandro Hidalgo v Franco Emanuel Egea | 6-3,6-2 |
| ITF Romania F12 | 2018/09/03 06:00 | Gabi Adrian Boitan v Gabriel Alejandro Hidalgo | 6-4,3-6,6-4 |
| ITF Belgium F4 | 2018/07/17 12:30 | Jeremy Sonkin v Gabriel Alejandro Hidalgo | 6-4,1-6,6-3 |
| ITF Argentina F3 | 2018/05/29 15:00 | Genaro Alberto Olivieri v Gabriel Alejandro Hidalgo | 6-1,7-6 |
| ITF Argentina F2 | 2018/05/23 16:45 | Gabriel Alejandro Hidalgo v Gonzalo Villanueva | 1-6,0-6 |
| ITF Argentina F2 | 2018/05/22 16:10 | Gabriel Alejandro Hidalgo v Agustin Visokolskis | 6-0,6-0 |