Korda rebounded from an opening 72 with a dazzling 6-under 66 at Tiburon Golf Club on a sunny, windswept day in south Florida. The bogey-free round included a hole-out for eagle on the third hole. The World No. 1 headed to the range after Thursday’s round and came away with one simple swing thought.

Korda has had a career year, but criticism of her major performances got to her, the No. 1 player in the world said recently.

Sometimes, one little swing thought can change everything—even for the best player in the world. World No. 1 Nelly Korda bumbled to an even-par 72 on Thursday at the CME Group Tour Championship, a round well below her standard.