| Lettland - Int. | 09/02 16:00 | - | Joonas Korhonen v Heng Lin Ngan | D |
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| Lettland - Int. | 09/02 07:00 | - | Joonas Korhonen v Heng Lin Ngan | W | 2-0 | |
| Croatia Open | 06/21 14:10 | - | Joonas Korhonen v Victor Lai | L | 1-2 | |
| Italian Int. - Kval | 06/02 07:00 | - | Ivan Rusev v Joonas Korhonen | L | 2-0 | |
| Portugal Int. | 03/11 15:00 | - | Alex Lanier v Joonas Korhonen | L | 2-0 | |
| Swedish Open | 01/21 11:40 | - | Korakrit Laotrakul v Joonas Korhonen | L | 2-0 | |
| Swedish Open | 01/21 09:40 | - | Albin Carl Hjelm v Joonas Korhonen | W | 0-2 | |
| Estonian Int. | 01/14 11:40 | - | Joonas Korhonen v Harshit Aggarwal | L | 1-2 | |
| Estonian Int. | 01/14 09:10 | - | Duarte Nuno Anjo v Joonas Korhonen | W | 0-2 | |
| Italian Int. | 12/17 09:20 | - | Samuel Hsiao v Joonas Korhonen | L | 2-1 | |
| Irish Open | 11/18 10:00 | 5 | Joonas Korhonen v Arnaud Merkle | L | 0-2 | |
| Ungern Int. | 11/04 12:20 | - | Joonas Korhonen v S.K. Karunakaran | L | 0-2 | |
| Dutch Open - Kval | 10/13 10:20 | - | Elias Bracke v Joonas Korhonen | W | 1-2 | |
| Lettland - Int. | 08/28 13:40 | - | Alex Lanier v Joonas Korhonen | L | 2-0 | |
| Lettland - Int. | 08/28 08:00 | - | Joonas Korhonen v Nicolas A. Mueller | W | 2-0 | |
| Lettland - Int. | 08/27 11:20 | - | Joel König v Joonas Korhonen | W | 0-2 | |
| Swedish Open - Kval | 01/16 17:45 | - | Jakob Godt v Joonas Korhonen | L | 2-1 | |
| Swedish Open - Kval | 01/16 14:30 | - | Joonas Korhonen v Rasmus Kæseler | W | 2-1 | |
| Swedish Open - Kval | 01/16 09:00 | - | Joonas Korhonen v Jacob Schueler | W | 2-1 | |
| Estonian Int. - Kval | 01/09 11:00 | - | Simon Sandholm v Joonas Korhonen | L | 2-0 | |
| Slovenien - Future Series | 11/22 10:45 | - | Joonas Korhonen v Gergo Pytel | W | 2-0 | |
| Norwegian Int. | 11/08 10:30 | - | Joakim Oldorff v Joonas Korhonen | L | 2-0 | |
| SaarLorLux Open | 10/29 19:00 | 6 | Yee Han Chong v Joonas Korhonen | L | 2-0 | |
| Bulgarian Int. | 10/06 08:00 | - | Joonas Korhonen v Dimitar Yanakiev | L | 0-2 | |
| Bulgarian Int. | 10/05 13:30 | - | Joonas Korhonen v Albin Carl Hjelm | W | 2-1 | |
| Bulgarian Int. | 10/05 07:30 | - | Peyo Boichinov v Joonas Korhonen | W | 1-2 | |
| Bulgarian Int. | 10/04 13:00 | - | Joonas Korhonen v Giovanni Toti | W | 2-0 | |
| Bulgarian Int. | 10/04 07:00 | - | Joonas Korhonen v Julien Scheiwiller | W | 2-0 | |
| Polen - Int. | 09/20 10:20 | 5 | Leon Seiwald v Joonas Korhonen | L | 2-1 | |
| Litauen - Int. | 06/07 11:15 | - | Joonas Korhonen v Jan Louda | L | 1-2 |