Tiger Woods’ former coach explains why the first move of the swing matters more than most golfers realise. One of the most neglected parts of the golf swing is the very beginning of it — the takeaway.

Suzann Pettersen tends to win in bunches. You can look it up. When she wins, she can become a raging fire, consuming whatever’s in her path. Her first victory under her new swing coach, Butch Harmon, ...