| Dutch Open | 2018/10/09 16:00 | Abts, Birger v Joonas Korhonen | W | 1-2 |
| Open de Suisse - Doubles Femmes - Qualif. | 2018/10/09 09:54 | Spencer-Smith, Michael v Joonas Korhonen | W | 0-2 |
| Open de Suisse - Doubles Femmes - Qualif. | 2018/09/21 08:10 | Liu, W. C. v Joonas Korhonen | L | 2-1 |
| Giraldilla Int. XD | 2018/04/13 13:20 | Joonas Korhonen v Toby Penty | L | 0-2 |
| Open de Suisse - Doubles Femmes - Qualif. | 2018/04/12 14:55 | Sondergaard, Karl Thor v Joonas Korhonen | W | 0-2 |
| Open de Suisse - Doubles Femmes - Qualif. | 2018/03/08 14:00 | Valentin Singer v Joonas Korhonen | W | 1-2 |
| Open de Suisse - Doubles Femmes - Qualif. | 2018/03/08 10:30 | Joonas Korhonen v Lidman, Douglas | W | 2-0 |
| Giraldilla Int. XD | 2018/01/19 10:00 | Maddaloni, Rosario v Joonas Korhonen | L | 2-0 |
| Giraldilla Int. XD | 2018/10/03 05:20 | Corvee, Lucas v Kim Bruun | L | 0-2 |
| Indonesia Masters XD | 2018/09/26 05:00 | Corvee, Lucas v Anthony Sinisuka Ginting | L | 0-2 |
| Open d'Angleterre | 2018/07/30 07:00 | Corvee, Lucas v Sameer Verma | L | 0-2 |
| Indonesia Masters XD | 2018/07/18 11:00 | Kean Yew Loh v Corvee, Lucas | L | 2-0 |
| Open de Thaïlande | 2018/07/11 08:40 | Corvee, Lucas v Avihingsanon, Suppanyu | L | 0-2 |
| Giraldilla Int. XD | 2018/06/17 08:00 | Corvee, Lucas v Toma Junior Popov | L | 0-2 |
| Giraldilla Int. XD | 2018/06/16 14:30 | Corvee, Lucas v Burestedt, Felix | W | 2-0 |
| Giraldilla Int. XD | 2018/06/15 14:35 | Corvee, Lucas v Luis Enrique Penalver | W | 2-1 |