If he denies with his body, cut behind him. Use his momentum against him. You have your defender behind you. Anytime the defender is vulnerable on the back side take advantage of it. The point guard should start on the ballside.
Most teams switch.
When the switch occurs, step across and seal the defender. You must take care of the ball. Use your body to protect the ball. Dribble low and hard. You must maintain maximum vision of the floor.