Stadium: Court 1 Round: 26 Ground: Clay
| ITF Austria F5 | 2017/08/02 08:00 | Ollert, Lukas v Haim, Matthias | 4-6,6-7 |
| ITF Austria F1 | 2018/07/03 08:00 | Haim, Matthias v Kirill Kivattsev | 6-3,6-2 |
| ITF Italy F14 | 2018/06/11 18:00 | Jacopo Berrettini v Haim, Matthias | 6-3,6-2 |
| ITF Romania F1 | 2018/05/25 07:00 | Haim, Matthias v Antonescu, Vasile | 3-6,1-6 |
| ITF Romania F1 | 2018/05/24 07:00 | Haim, Matthias v Borza, Bogdan | 6-4,6-4 |
| ITF Romania F1 | 2018/05/22 07:00 | Haim, Matthias v Willems, Johann | 7-6,7-6 |
| ITF Italy F9 | 2018/05/14 11:00 | Haim, Matthias v Giovanni Fonio | 3-6,3-6 |
| ITF Italy F9 | 2018/04/23 14:55 | Haim, Matthias v Laurent Lokoli | 0-6,1-6 |
| ITF Italy F7 | 2018/04/10 15:25 | Apostol, Bogdan Ionut v Haim, Matthias | 6-2,3-6,6-2 |
| ITF Austria F1 | 2018/07/02 11:10 | Ollert, Lukas v Martins Rocens | 6-1,6-1 |
| ITF Tunisia F25 | 2018/06/26 10:15 | Ollert, Lukas v Gabi Adrian Boitan | 1-6,1-6 |
| ITF Italy F15 | 2018/06/20 18:00 | Ollert, Lukas v Turchetti, Nicolo | 6-3,1-6,5-7 |
| ITF Sweden F2 | 2018/05/17 12:35 | Ollert, Lukas v Alexander Ritschard | 1-6,1-6 |
| ITF Sweden F2 | 2018/05/16 10:15 | Ollert, Lukas v Jonas Trinker | 6-1,6-4 |
| ITF Sweden F2 | 2018/05/15 11:40 | Ollert, Lukas v Nick Chappell | 6-2,6-7,7-5 |
| Tunisia F17, Singles Qualifying | 2018/05/02 10:40 | Ibraimi, Mustafa v Ollert, Lukas | 6-3,6-4 |
| ITF Bahrain F1 | 2018/03/21 08:00 | Obert, Adrian v Ollert, Lukas | 2-6,3-6 |