Stadium: Court 10 Round: 26 Ground: Hardcourt indoor
| ITF Croatia F2 | 2018/03/14 10:55 | Lazarov, Alexandar v Andres Gabriel Ciurletti | 6-0,6-3 |
| ITF Croatia F1 | 2018/03/09 14:30 | Lazarov, Alexandar v Viola, Matteo | 3-6,0-6 |
| ITF Croatia F1 | 2018/03/09 10:50 | Kalender, Admir v Lazarov, Alexandar | 2-6,4-6 |
| ITF Croatia F1 | 2018/03/08 09:00 | Lazarov, Alexandar v Zmak, Deni | 6-4,6-3 |
| ITF Croatia F1 | 2018/03/04 16:00 | Lazarov, Alexandar v Gorazd Srbljak | 6-7,6-3,6-1 |
| ATP Sofia Qual | 2018/02/04 12:40 | Oscar Otte v Lazarov, Alexandar | 6-7,7-5,6-1 |
| ITF Turkey F45 | 2017/11/30 09:15 | Lazarov, Alexandar v Hampel, Lenny | 5-7,1-6 |
| ITF Turkey F45 | 2017/11/29 08:10 | Lazarov, Alexandar v Tatomir, Luca Georg | 6-1,7-6 |
| ITF Croatia F2 | 2018/03/13 11:50 | Hu, Xin v Jahn, Jeremy | 1-6,2-6 |
| ITF Italy F1 | 2018/03/02 13:00 | Neuchrist, Maximilian v Jahn, Jeremy | 1-6,6-4,6-4 |
| ITF Italy F1 | 2018/02/28 12:40 | Luca Giacomini v Jahn, Jeremy | 3-6,2-6 |
| ITF Italy F1 | 2018/02/26 11:20 | Alexander Weis v Jahn, Jeremy | 6-7,2-6 |
| Challenger Bergamo Qual | 2018/02/17 18:20 | Jahn, Jeremy v Horansky, Filip | 4-6,2-6 |
| Challenger Budapest | 2018/02/06 12:20 | de Greef, Arthur v Jahn, Jeremy | 6-1,6-3 |
| Challenger Budapest Qual | 2018/02/05 10:00 | Jahn, Jeremy v Bega, Alessandro | 6-2,7-6 |
| Challenger Budapest Qual | 2018/02/04 11:05 | Jahn, Jeremy v Hampel, Lenny | 6-3,7-5 |