Stadium: Opatija 3 Round: 25 Ground: Clay
| ITF Croatia F2 | 2018/03/16 13:30 | Mate Valkusz v Viola, Matteo | 0-6,6-2,6-1 |
| ITF Croatia F2 | 2018/03/15 11:25 | Cezar Cretu v Viola, Matteo | 2-6,2-6 |
| ITF Croatia F2 | 2018/03/14 14:50 | Sabanov, Ivan v Viola, Matteo | 3-6,0-6 |
| ITF Croatia F1 | 2018/03/10 09:00 | Javier Barranco Cosano v Viola, Matteo | 4-6,7-6,6-2 |
| ITF Croatia F1 | 2018/03/09 14:30 | Alexandar Lazarov v Viola, Matteo | 3-6,0-6 |
| 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 Croatia F2 | 2018/03/14 10:35 | Prechtel, Sebastian v Nik Razborsek | 1-6,6-4,4-6 |
| ITF Croatia F1 | 2018/03/07 09:00 | Prechtel, Sebastian v Kranic, Karlo | 2-6,7-5,4-10 |
| ITF Croatia F1 | 2018/03/04 15:00 | Prechtel, Sebastian v Nincevic, Frane | 6-4,7-5 |
| Challenger Eckental Qual | 2017/10/30 11:30 | Evan Furness v Prechtel, Sebastian | 7-5,6-1 |
| Challenger Eckental Qual | 2017/10/29 09:00 | Prechtel, Sebastian v Penzkofer, Fabian | 6-2,6-1 |
| Challenger Eckental Qual | 2017/10/28 07:30 | Prechtel, Sebastian v Siljestrom, Andreas | 4-6,6-1,6-1 |
| ITF Germany F16 | 2017/10/24 12:25 | Prechtel, Sebastian v Daniel Masur | 3-6,3-6 |
| ITF Germany F16 | 2017/10/23 10:00 | Prechtel, Sebastian v Veldheer, Mick | 6-3,5-7,6-1 |