That only does two things:
1. If they win, they only beat someone who they admitted wasn't very good anyway.
2. Even worse, if they lose, they lose to someone who they admit isn't too good.
If a fighter wants to say some derogatory things about a future opponent to build interest in the fight and maybe even give the impression threes bad blood between the two of them, insult a future opponent personally and not on his fighting ability. Instead attack his character or other things which aren't related to how good he is at fighting!
1. If they win, they only beat someone who they admitted wasn't very good anyway.
2. Even worse, if they lose, they lose to someone who they admit isn't too good.
If a fighter wants to say some derogatory things about a future opponent to build interest in the fight and maybe even give the impression threes bad blood between the two of them, insult a future opponent personally and not on his fighting ability. Instead attack his character or other things which aren't related to how good he is at fighting!