Stadium: COURT 2 Round: 54 Ground: Hardcourt indoor
| ITF M15 Lodz | 2021/08/16 08:00 | Arvid Nordquist v Juliusz Bienkiewicz | 3-6,6-4,10-5 |
| ITF M15 Parnu | 2021/08/04 08:25 | Arvid Nordquist v Paul Valsecchi | 5-7,1-6 |
| ITF M15 Parnu | 2021/08/03 07:00 | Arvid Nordquist v Shchaya-Zubrov, Pavel | 6-2,6-3 |
| ITF M15 Parnu | 2021/08/02 07:00 | Arvid Nordquist v Peetu Pohjola | 6-4,6-0 |
| ITF M15 Almada | 2021/07/04 13:00 | Arvid Nordquist v Morais, Eduardo | 3-6,4-6 |
| ITF M15 Helsinki | 2021/06/01 08:45 | Arvid Nordquist v Minakov, Mikhail | 3-6,3-6 |
| ITF M15 Helsinki | 2021/05/31 10:00 | Arvid Nordquist v Saatela, Leevi | 6-3,6-2 |
| ITF M15 Kouvola | 2021/05/27 07:00 | Bega, Alessandro v Arvid Nordquist | 5-7,7-5,6-3 |
| ITF M15 Frederiksberg | 2021/08/02 08:50 | Adam Heinonen v Patzanovsky, Christopher | 3-6,4-6 |
| ITF M15 Frederiksberg | 2021/08/01 08:00 | Adam Heinonen v Katic, Nikolaj | 6-3,6-7,10-6 |
| ITF M15 Vejle | 2021/07/25 07:00 | Adam Heinonen v Philip Hjorth | 1-6,6-4,8-10 |
| ITF - M15 Antalya | 2021/05/09 07:00 | Adam Heinonen v Di Nocera, Riccardo | 3-6,6-2,2-10 |
| ITF - M15 Antalya | 2021/05/02 06:00 | Adam Heinonen v Valentin Vanta | 3-6,6-3,6-10 |
| Ystad, Singles M-ITF-SWE-03A | 2019/08/08 13:10 | Adam Heinonen v Niklas-Salminen, Patrick | 4-6,5-7 |
| Ystad, Singles M-ITF-SWE-03A | 2019/08/07 08:15 | Adam Heinonen v Piotr Grynkowski | 2-6,6-3,7-5 |
| Ystad, Singles M-ITF-SWE-03A | 2019/08/06 10:05 | Adam Heinonen v Bhullard, Rana-Roop Singh | 7-5,6-2 |