okay thanks, I'll give it a go and lately I've playing more tournament and league matches instead of practice.An experience told me that I should not play competition until I have fix my technical issues.What do you think?
In a way that is true. When you have a habit ingrained and can't get rid of it, because it keeps coming up in games even though it doesn't in practice, not playing matches for a few weeks, or months, while working on losing the bad habit helps, because every time you do it in a match, you reinforce the bad movement pattern.
But we only live once. Playing matches is fun. So, you have to decide that for yourself. When you really get the right stroke in your body, the old pattern will slowly stop happening in matches.
It just takes a lot of work to change habits that are unconscious, that we are not aware of while we are doing them, or at least until after we have started the movement.