Blocking, on-ball defender does not establish legal position

This is an example of an on-ball defensive foul for blocking. The on-ball defender here does not beat the offensive player with the ball to the spot, and the contact is made from the side. This is illegal contact and a defensive foul. To get into a legal position, the defender here needs to establish himself in the path of the offensive player before contact is made, and before the offensive player starts his upward shooting motion.