im lack of what ??

during my training..coach ask me to team up sifu...then ccc team with nickly..sifu is a very pro badminton player.his smash and smash defend are very good...but we lost..nickly and ccc say i noob a..bla bla bla..then sifu say"you guys cant say like that to him.."then he tell me"dont worry..you still have a long way to go.."but i dont know..im lack of what ?need more time to think..