Hi Jeppe,
The best way to avoid playing these backhands from the forehand side is to really focus on the feet and body position. Make sur eyour right foot is always begind the left (If your right handed) and that it doesn’t step in front towards the ball, this can cause backwards from the middle or forehand.
Forehands from the backhand aren’t to much too much of a problem if your footwork is ok, but backhands on forehand mean you get out of position. You need to do lot’s of irregular switching drills where you have to choose backhand or forehand, the best one is someone simply blocking you around the whole table and you topspin into their backhand.
