Common Problem: Cupped Left Wrist
Recreational golfers who slice the ball have a cupped left wrist at the top, leading to an open clubface at impact.
Flat Left Wrist In Line With Forearm
Check your left wrist at the top; it should be flat and form a perfect line with your forearm.
Check Your Angle At The Top
Stop your backswing at the top and make sure the back of your left hand and the clubface match.