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If you slice, it’s likely because you allow the clubhead to move in front of your hand path on the way down to the ball from the top. The club needs to stay behind your hand path until you start moving into impact.
Next time you practice, position a ball just off your back foot as you see I’ve done here. Set up like normal and swing.
Using your peripheral vision as you start down, use the second ball as a guide for your clubhead, making sure it stays behind the ball instead of moving in front of it (as in away from you).
The trick is to allow your trail arm to elongate while keeping the bend in your trail wrist (i.e., how it’s set at the top) for as long as possible.
Clubhead behind hand path: no slice and plenty of power.
Give it a try.
David Woods is a GOLF Top 100 Teacher and the CEO of ProSENDR Golf.