Stadium: Central Court Round: 25 Ground: Clay
| ITF Romania F8 | 2018/08/07 07:00 | Volfson, David v Apostol, Bogdan Ionut | 1-6,2-6 |
| Challenger Granby | 2018/07/21 18:55 | Volfson, David v Lin, Jack Mingjie | 4-6,2-6 |
| Challenger Gatineau Qual | 2018/07/15 00:45 | Boulais, Justin v Volfson, David | 6-3,6-2 |
| Challenger Winnipeg | 2018/07/10 18:20 | Volfson, David v Yunseong Chung | 3-6,3-6 |
| ITF Canada F5 | 2018/07/06 19:40 | Volfson, David v Griffith, William | 6-7,6-2,3-6 |
| ITF Canada F5 | 2018/07/05 18:20 | Halebian, Alexios v Volfson, David | 4-6,6-7 |
| ITF Canada F5 | 2018/07/03 16:00 | Taha Baadi v Volfson, David | 5-7,0-6 |
| ITF USA F16 | 2018/06/19 17:00 | Volfson, David v Godamanna, Harshana | 7-6,4-6,2-6 |
| ITF Romania F8 | 2018/08/07 07:00 | Manda, Calin v Gabi Adrian Boitan | 3-6,1-6 |
| ITF Austria F5 | 2018/08/01 08:00 | Urbanija, Mike v Manda, Calin | 7-6,6-3 |
| ITF Austria F4 | 2018/07/25 08:00 | Manda, Calin v Borza, Bogdan | 5-7,4-6 |
| ITF Austria F4 | 2018/07/24 13:10 | Reznicek, Vladimír v Manda, Calin | 6-7,1-6 |
| ITF Austria F2 | 2018/07/12 13:05 | Nerman Fatic v Manda, Calin | 4-6,6-1,6-3 |
| ITF Austria F2 | 2018/07/11 12:20 | Vigani, Joy v Manda, Calin | 6-3,2-6,2-6 |
| ITF Austria F2 | 2018/07/10 11:10 | Manda, Calin v Paul Woerner | 6-2,5-7,6-4 |
| ITF Austria F1 | 2018/07/03 08:00 | Pena Lopez, Manuel v Manda, Calin | 6-4,6-4 |