Jason Day was three up with four holes to play, an ideal start to the Dell Match Play that included five birdies and hardly any stress.
And then he felt his back tighten on a tee shot at the 15th hole.
It stung so badly on his next tee shot that Day grabbed his back and winced. He stepped gingerly into a bunker. When his short par was conceded, he took a knee. Exactly what happened was not entirely clear because Day immediately sought treatment and left without speaking to reporters. But with a long week ahead of him at Austin Country Club and the Masters only two weeks away, this victory surely felt hollow.
Without much drama on the golf course because of tough greens...