Stadium: Court 4 Round: 27 Ground: Clay
| ITF Austria F2 | 2018/07/11 12:15 | David Pichler v Alexandar Lazarov | 6-2,5-7,1-6 |
| ITF Austria F2 | 2018/07/10 09:00 | Ergi Kirkin v Alexandar Lazarov | 5-7,4-6 |
| ITF Tunisia F25 | 2018/06/29 08:30 | Galarza, Juan Ignacio v Alexandar Lazarov | 7-5,6-4 |
| ITF Tunisia F25 | 2018/06/28 09:35 | Roncalli, Simone v Alexandar Lazarov | 3-6,6-3,3-6 |
| ITF Tunisia F25 | 2018/06/26 11:05 | Meraut, Tristan v Alexandar Lazarov | 2-6,5-7 |
| ITF Romania F2 | 2018/05/31 14:00 | Alexandar Lazarov v Dima, Dragos | 1-6,1-6 |
| ITF Romania F2 | 2018/05/29 08:00 | Alexandar Lazarov v Vladyslav Orlov | 6-0,6-0 |
| ITF Romania F1 | 2018/05/24 07:00 | Perchicot, Mathieu v Alexandar Lazarov | 4-6,5-7 |
| ITF Austria F2 | 2018/07/11 09:00 | Alexander Weis v Haerteis, Johannes | 2-6,6-4,6-7 |
| ITF Austria F2 | 2018/07/09 12:00 | Haerteis, Johannes v Jonathan Stenberg | 6-1,7-5 |
| Challenger Marburg Qual | 2018/06/30 12:40 | Haerteis, Johannes v Daniel Masur | 4-6,4-6 |
| L'Aquila, Italie | 2018/06/19 10:00 | Haerteis, Johannes v Balzerani, Riccardo | 6-4,2-6,4-6 |
| Challenger L'Aquila Qual | 2018/06/18 09:55 | Zhizhen Zhang v Haerteis, Johannes | 5-7,6-7 |
| Challenger L'Aquila Qual | 2018/06/17 13:30 | Haerteis, Johannes v Caruana, Liam | 7-6,6-0 |
| Challenger L'Aquila Qual | 2018/06/16 14:25 | Haerteis, Johannes v Jordan Correia Passos Do Carmo | 1-6,7-6,7-6 |
| ITF Italy F14 | 2018/06/13 14:20 | Bellotti, Riccardo v Haerteis, Johannes | 6-3,6-2 |