| VM i bordtennis | 05/20 09:55 | 57 | Martin Allegro v Yonghun Lee | L | 4-0 | |
| Challenger Series TT | 04/07 10:30 | - | Kirill Fadeev v Yonghun Lee | L | 3-1 | |
| Challenger Series TT | 04/07 06:30 | - | Damian Zech v Yonghun Lee | W | 1-3 | |
| Challenger Series TT | 04/06 18:30 | - | Yonghun Lee v Dimitrije Levajac | L | 1-3 | |
| Challenger Series TT | 04/06 15:10 | - | Yonghun Lee v Makoto Nogami | W | 3-0 | |
| Challenger Series TT | 04/06 13:10 | - | Florian Bourrassaud v Yonghun Lee | L | 3-0 | |
| Challenger Series TT | 04/06 10:30 | - | Yannick Vostes v Yonghun Lee | L | 3-0 | |
| Challenger Series TT | 04/06 07:50 | - | Dennis Klein v Yonghun Lee | L | 3-1 | |
| WTT Singapore Smash Quals | 03/07 06:15 | 7 | Yonghun Lee v Cheng-Ting Liao | L | 0-3 | |
| WTT Feeder Dusseldorf II | 02/23 12:10 | - | Youssef Abdel-Aziz v Yonghun Lee | L | 3-1 | |
| WTT Feeder Dusseldorf II | 02/22 15:40 | - | Benno Oehme v Yonghun Lee | W | 2-3 | |
| WTT Feeder Düsseldorf | 02/15 11:55 | - | Yonghun Lee v Martin Allegro | L | 1-3 |