Stadium: Eden 1 Round: 26 Ground: Clay
| ITF Croatia F1 | 2018/03/09 10:50 | Kalender, Admir v Alexandar Lazarov | 2-6,4-6 |
| ITF Croatia F1 | 2018/03/08 09:00 | Alexandar Lazarov v Zmak, Deni | 6-4,6-3 |
| ITF Croatia F1 | 2018/03/04 16:00 | Alexandar Lazarov v Gorazd Srbljak | 6-7,6-3,6-1 |
| ATP Sofia Qual | 2018/02/04 12:40 | Oscar Otte v Alexandar Lazarov | 6-7,7-5,6-1 |
| ITF Turkey F45 | 2017/11/30 09:15 | Alexandar Lazarov v Hampel, Lenny | 5-7,1-6 |
| ITF Turkey F45 | 2017/11/29 08:10 | Alexandar Lazarov v Tatomir, Luca Georg | 6-1,7-6 |
| ITF Turkey F44 | 2017/11/23 07:15 | Lazov, Alexander v Alexandar Lazarov | 6-4,1-6,6-0 |
| ITF Turkey F43 | 2017/11/16 06:45 | Alexandar Lazarov v Riccardo Bonadio | 4-6,2-6 |
| ITF Croatia F1 | 2018/03/08 12:30 | Perez Sanz, David v Viola, Matteo | 3-6,2-6 |
| Bergamo, Italy | 2018/02/21 19:30 | Matteo Berrettini v Viola, Matteo | 6-3,6-1 |
| ITF Great Britain F1 | 2018/02/03 10:00 | Mertens, Yannick v Viola, Matteo | 7-6,6-1 |
| ITF Great Britain F1 | 2018/02/02 10:00 | Willis, Marcus v Viola, Matteo | 6-7,3-6 |
| ITF Great Britain F1 | 2018/01/31 13:00 | Butler, Samm v Viola, Matteo | 1-6,1-6 |
| ITF France F3 | 2018/01/26 12:00 | Viola, Matteo v Albano Olivetti | 6-7,6-4,5-7 |
| ITF France F3 | 2018/01/25 14:55 | Viola, Matteo v Bauvy, Romain | 7-6,6-3 |
| ITF France F3 | 2018/01/23 15:10 | Viola, Matteo v Van Terheijden, Tim | 6-3,0-6,6-4 |