Stadium: Court 8 Round: 54 Ground: Hardcourt outdoor
| ITF M15 Helsinki | 2019/08/19 10:00 | Mattias Siimar v Tomas Vanko | 6-1,6-0 |
| ITF M15 Parnu | 2019/07/15 07:00 | Mattias Siimar v Tadas Babelis | 6-2,3-6,13-15 |
| ITF Finland F2 | 2018/08/08 12:55 | Mattias Siimar v Gustav Hansson | 2-6,2-6 |
| ITF Finland F2 | 2018/08/06 08:00 | Siim Troost v Mattias Siimar | 6-2,1-6,0-6 |
| ITF Finland F1 | 2018/08/02 11:00 | Mattias Siimar v Patrik Niklas-Salminen | 4-6,6-7 |
| ITF Finland F1 | 2018/08/01 09:35 | Hugo Pontico v Mattias Siimar | 4-6,4-6 |
| ITF Finland F1 | 2018/07/30 07:00 | Mattias Siimar v Kristjan Tamm | 6-1,6-2 |
| ITF Estonia F1 | 2018/07/19 10:00 | Dragos Nicolae Madaras v Mattias Siimar | 3-6,6-1,6-2 |
| ITF M15 Helsinki | 2019/08/19 10:00 | Harshal Rukhaiyar v Roni Rikkonen | 3-6,0-6 |
| Challenger Tampere | 2019/07/22 10:45 | Viktor Durasovic v Roni Rikkonen | 2-6,7-5,6-0 |
| ITF Finland F4 | 2018/11/10 13:45 | Christian Seraphim v Roni Rikkonen | 7-5,6-1 |
| ITF Finland F3 | 2018/08/12 09:35 | Patrick Mayer v Roni Rikkonen | 6-4,6-2 |
| ITF Finland F3 | 2018/08/11 07:00 | Roni Rikkonen v Jason Sormunen | 6-2,6-0 |
| ITF Finland F2 Qual | 2018/08/04 07:00 | Roni Rikkonen v Martins Rocens | 2-6,4-6 |
| ITF Finland F1 Qual | 2018/07/28 07:00 | Roni Rikkonen v Ettore Capello | 3-6,3-6 |
| ITF Finland F4 Qual | 2017/11/12 09:40 | Ville-Petteri Ahti v Roni Rikkonen | 6-1,6-1 |