| Polish Int. | 2019/09/20 10:20 | Leon Seiwald v Joonas Korhonen | L | 2-1 |
| Lithuanian Int. | 2019/06/07 11:15 | Joonas Korhonen v Jan Louda | L | 1-2 |
| Latvia Int. | 2019/05/31 14:00 | Joonas Korhonen v Richard Kuhl | W | 2-0 |
| Croatian Int. | 2019/04/19 08:30 | Joonas Korhonen v Martin Bundgaard | L | 0-2 |
| Finnish Open Qual | 2019/04/04 07:45 | Joonas Korhonen v Abhinav Manota | W | 2-0 |
| Swiss Open WD Qual | 2019/03/07 10:30 | Alvaro Vazquez v Joonas Korhonen | L | 2-0 |
| Swiss Open WD Qual | 2019/01/17 16:30 | Joonas Korhonen v Henri Hurskainen | L | 1-2 |
| Swiss Open WD Qual | 2019/01/10 15:00 | Johnnie Torjussen v Joonas Korhonen | L | 2-0 |
| Swiss Open WD Qual | 2019/01/17 09:00 | Hampus Boldt v Rasmus Kæseler | W | 0-2 |
| Swiss Open WD Qual | 2018/01/18 16:00 | Mickey Lykkegren v Rasmus Kæseler | L | 2-1 |
| Swiss Open WD Qual | 2017/12/05 15:30 | Vincent Medina v Rasmus Kæseler | L | 2-1 |
| Giraldilla Int. XD | 2017/01/19 12:06 | Rasmus Kæseler v Fabio Caponio | W | 2-1 |