Stadium: Court 1 Round: 28 Ground: Hardcourt indoor
| ITF Austria F2 | 2018/07/13 10:00 | Peter Heller v Nerman Fatic | 6-7,6-3,2-6 |
| ITF Austria F2 | 2018/07/12 11:15 | Peter Heller v Lukas Ollert | 6-3,6-2 |
| ITF Austria F2 | 2018/07/11 09:00 | Peter Heller v Filip Duda | 3-6,7-6,6-1 |
| ITF Austria F2 | 2018/07/09 10:30 | Peter Heller v Philip Aplienz | 6-2,6-2 |
| ITF Italy F15 | 2018/06/24 15:15 | Peter Heller v Pietro Rondoni | 7-6,4-6,2-6 |
| ITF Italy F15 | 2018/06/23 12:00 | Andrea Guerrieri v Peter Heller | 1-6,3-6 |
| ITF Italy F15 | 2018/06/22 10:00 | Peter Heller v Luca Nardi | 3-6,6-3,6-3 |
| ITF Italy F15 | 2018/06/21 10:50 | Peter Heller v Alexander Weis | 6-3,6-7,6-3 |
| ITF Malaysia F3 | 2018/07/16 04:30 | Daisuke Sumizawa v Siddharth Vishwakarma | 1-6,2-6 |
| ITF Malaysia F2 | 2018/07/08 04:30 | Thomas Hann v Daisuke Sumizawa | 7-5,6-1 |
| ITF Guam F1 | 2018/06/19 04:30 | Yuichi Ito v Daisuke Sumizawa | 6-3,4-6,6-3 |
| ITF Japan F8 | 2018/06/11 00:30 | Keisuke Watanuki v Daisuke Sumizawa | 6-4,2-6,6-2 |
| ITF Japan F7 Qual | 2018/06/02 01:00 | Daisuke Sumizawa v Taisei Miyamoto | 2-6,4-6 |
| ITF Vietnam F3 | 2018/05/13 04:00 | Nicholas Bybel v Daisuke Sumizawa | 6-1,6-3 |
| ITF Vietnam F3 | 2018/05/12 03:00 | Artem Vu v Daisuke Sumizawa | 3-6,1-6 |
| ITF Vietnam F2 | 2018/05/05 05:00 | Daisuke Sumizawa v Jirat Navasirisomboon | 2-6,5-7 |