Malaysian men's singles star Lee Zii Jia lost to Kento Momota 15-21, 19-21 at the Korea Badminton Open yesterday and missed the semi-finals. This is also the third time he has lost to Momota Kento this year after the Sudirman Cup and World Championships.   Li Zijia said: "I am still far away from him. I have tried my best and I almost beat him. Some people say that I performed well this time, but I am not satisfied with my performance. But I know that I can gradually improve and narrow the gap by redoubling my efforts."   He added: "It will not be easy, but defeating Momota Kento is one of my goals, and I will achieve this goal."   On the other hand, coach Ye Chengman also praised Li Zijia's efforts.   "Li Zijia's performance was much better than his defeat at the World Championships. We tried to find a tactic to beat Momota, but it is undeniable that his opponent is at a different level."