Grip the club "Stronger"

I have found that the root cause of an over-the-top downswing is often an open club face. If a golfer can’t get the face square at impact, they react by swinging the club over-the-top to try and hit the ball straight. Moving the grip to a “stronger”, or more hook-like position, will square the face and allow the golfer to swing the club on a more inside-to-out path as it approaches the ball.