| Qatar Open | 2018/03/09 14:10 | Sangsu Lee v Xin Xu | L | 0-4 |
| Qatar Open | 2018/03/08 14:20 | Sangsu Lee v Bastian Steger | W | 4-2 |
| Qatar Open - Dublu Mixt | 2018/02/24 18:00 | Tomokazu Harimoto v Sangsu Lee | W | 2-3 |
| Qatar Open - Dublu Mixt | 2018/02/23 20:30 | Sangsu Lee v Emmanuel Lebesson | L | 2-3 |
| Qatar Open - Dublu Mixt | 2018/02/23 19:30 | Sangsu Lee v Quentin Robinot | L | 0-3 |
| Qatar Open - Dublu Mixt | 2018/02/23 12:30 | Sangsu Lee v Heming Hu | W | 3-1 |
| Qatar Open - Dublu Mixt | 2018/02/22 21:00 | Benedikt Duda v Sangsu Lee | W | 1-3 |
| Qatar Open - Dublu Mixt | 2018/02/22 19:30 | Dimitrij Ovtcharov v Sangsu Lee | L | 3-0 |
| Challenger - Ochsenhausen | 2018/02/13 12:00 | Miroslav Horejsi v Niagol Stoyanov | W | 1-3 |
| Challenger - Ochsenhausen | 2018/02/13 10:40 | Niagol Stoyanov v Jiri Vrablik | L | 0-3 |
| Challenger - Ochsenhausen | 2018/02/12 20:20 | He Bai v Niagol Stoyanov | W | 1-3 |
| Challenger - Ochsenhausen | 2018/02/12 17:40 | Evgueni Chtchetinine v Niagol Stoyanov | L | 3-0 |
| Challenger - Ochsenhausen | 2018/02/12 15:40 | Frane Kojic v Niagol Stoyanov | L | 3-1 |
| Challenger - Ochsenhausen | 2018/02/12 10:50 | Fedor Kuzmin v Niagol Stoyanov | L | 3-2 |
| Challenger - Ochsenhausen | 2018/02/12 08:10 | Patrik Klos v Niagol Stoyanov | W | 0-3 |
| Qatar Open - Dublu Mixt | 2018/01/17 11:30 | Benedek Olah v Niagol Stoyanov | L | 4-1 |