The defender has a singular mindset… stop the pass being made to the wing at all costs by overplaying and denying
Station yourself at the top of the key with a ball. A player is on the left wing. Position one offensive and one defensive player on the opposite wing.
HOW TO PLAY
On your command, the offensive player on the wing tries to get free from the defender . If the initial pass is denied by the defender, the offensive player continues to work that side of the floor in an attempt to find an opening. If a pass cannot be made, you should make a pass to the left wing . This pass forces the defender to sag into the lane  to guard the ball and keep an eye on the original assignment, which makes denying the pass even more difficult.
The defender is moving at full speed the entire time of the drill. If there is a momentary lapse, the offensive player takes advantage and receives the pass from you, the coach. The player on the left wing can’t dribble but can make ball fakes to move the defender away from defending the opposite wing.