| Swiss Open - Damdubbel - Kval | 2018/03/08 14:00 | Valentin Singer v Joonas Korhonen | W | 1-2 |
| Swiss Open - Damdubbel - Kval | 2018/03/08 10:30 | Joonas Korhonen v Douglas Lidman | W | 2-0 |
| Giraldilla Int. - Mixed dubbel | 2018/01/19 10:00 | Rosario Maddaloni v Joonas Korhonen | L | 2-0 |
| Swiss Open - Damdubbel - Kval | 2018/01/18 10:30 | Richard Kuhl v Joonas Korhonen | W | 0-2 |
| Swiss Open - Damdubbel - Kval | 2018/01/11 18:15 | Joonas Korhonen v Kevin Arokia Walter | W | 2-1 |
| Swiss Open - Damdubbel - Kval | 2018/01/11 07:30 | Marton Szerecz v Joonas Korhonen | W | 1-2 |
| Giraldilla Int. - Mixed dubbel | 2017/09/22 09:30 | Mihkel Laanes v Joonas Korhonen | W | 0-2 |
| Giraldilla Int. - Mixed dubbel | 2016/12/07 14:19 | Mikkel Mikkelsen v Joonas Korhonen | L | 2-0 |
| Swiss Open - Damdubbel - Kval | 2018/04/12 07:35 | Christoffer Elbrond v Torjus Flaatten | W | 1-2 |
| Indonesia Masters - Mixed dubbel | 2018/02/14 06:45 | Iikka Heino v Torjus Flaatten | L | 2-0 |
| Swiss Open - Damdubbel - Kval | 2017/12/05 13:15 | Torjus Flaatten v Frederik Aalestrup | L | 1-2 |