Stadium: Hard 17 Round: 44 Ground: Hardcourt outdoor
| ITF M15 Sofia | 2023/07/06 08:10 | Adam Heinonen v Denis Klok | 1-6,1-6 |
| ITF M15 Sofia | 2023/07/05 06:00 | Sean Hess v Adam Heinonen | 7-5,5-7,5-7 |
| ITF M15 Sofia | 2023/07/03 14:30 | Aristotelis Thanos v Adam Heinonen | 3-6,5-7 |
| ITF M15 Sofia | 2023/07/03 09:30 | Ioannis Kountourakis v Adam Heinonen | 6-7,5-7 |
| ITF M15 Wroclaw | 2023/06/26 12:00 | Jasza Szajrych v Adam Heinonen | 2-6,6-3,10-7 |
| ITF M15 Wroclaw | 2023/06/26 08:00 | Przemyslaw Michocki v Adam Heinonen | 2-6,0-6 |
| ITF M15 Wroclaw | 2023/06/25 10:30 | Joan Nadal Vives v Adam Heinonen | 5-7,0-6 |
| ITF M15 Saarlouis | 2023/06/22 14:55 | Adam Heinonen v Matthew Dellavedova | 3-6,6-3,3-6 |