Jonas Marcussen vs Joachim Sejr
4 games played · Jonas Marcussen 2–2 Joachim Sejr
Includes every meeting regardless of who each player's partner was at the time.
| Date | Event | Round | Jonas Marcussen's team | Joachim Sejr's team | Result | Sets |
|---|---|---|---|---|---|---|
| 2 Jun 2018 | Ishøj Challenger (Elite/division Herrer - 2. division (8 hold)) | 0 | Kristian Rieland Vemmelund (U21) / Jonas Marcussen (U18) | Joachim Sejr - Nikolai Tolstoy | 0-2 | 10-21, 13-21 |
| 2 Jun 2018 | Ishøj Challenger (Elite/division Herrer - 2. division (8 hold)) | Finalerunde | Kristian Rieland Vemmelund (U21) / Jonas Marcussen (U18) | Joachim Sejr - Nikolai Tolstoy | 0-2 | 6-21, 7-21 |
| 21 Jul 2018 | Hornbæk Semifinalestævne (Elite/division Herrer - 1. division (8 hold)) | Finalerunde | Mikkel Hoff (U18) - Jonas Marcussen (U18) | Joachim Sejr - Marcelo Bertalan | 2-0 | 21-13, 21-17 |
| 21 Jul 2018 | Hornbæk Semifinalestævne (Elite/division Herrer - 1. division (8 hold)) | Finalerunde | Mikkel Hoff (U18) - Jonas Marcussen (U18) | Joachim Sejr - Marcelo Bertalan | 2-0 | 21-13, 21-17 |