| ITTF World Championships | 05/20 09:55 | 57 | 알레그로, 마틴 v Yonghun Lee | L | 4-0 | |
| Challenger Series TT | 04/07 10:30 | - | 파데예프, 키릴 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 레바자크, 디미트리 | 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 | - | 보츠, 야니크 v Yonghun Lee | L | 3-0 | |
| Challenger Series TT | 04/06 07:50 | - | 클라인, 데니스 v Yonghun Lee | L | 3-1 | |
| WTT Singapore Smash Quals | 03/07 06:15 | 7 | Yonghun Lee v 리아우, 청-팅 | L | 0-3 | |
| WTT Feeder Dusseldorf II | 02/23 12:10 | - | 압델-아지즈, 유세프 v Yonghun Lee | L | 3-1 | |
| WTT Feeder Dusseldorf II | 02/22 15:40 | - | 오흐메, 벤노 v Yonghun Lee | W | 2-3 | |
| WTT Feeder Dusseldorf | 02/15 11:55 | - | Yonghun Lee v 알레그로, 마틴 | L | 1-3 |