How do I teach timing to a defence player who continually?

How do I teach timing to a defence player who continually comes in late and gets penalised for contact.  I dont think its intentional, but it is continual

I think one way would to be getting the player to mark by the the side of their player. Get another person to pass them a ball. And just get this marker to intercept the ball without contact on the player. once they start getting their timings more accurate and without fouling, increase the level of the practice by moving the players around or changing the passing. Up to the point where you get into almost free play. The main idea I would say to you is to just get them doing it right, giving them praise for it but just getting them to keep doing it and doing it and eventually it will stick with them.