MARANA, Ariz. -- Nicolas Colsaerts of Belgium, a 10th seed, defeated American Bill Haas, a seventh seed, 5 and 4, in their first-round match at the World Golf Championships-Accenture Match Play Championship.
Colsaerts advances to play the Justin Rose-K.J. Choi winner in the second round of the Hogan bracket.
Colsaerts entered the day 3 up through eight holes. He parred all six of his holes Thursday. Meanwhile, Haas bogeyed the par-5 11th when he was forced to take a penalty stroke after an errant tee shot, then bogeyed the par-4 14th after a poor approach shot left him in the native area.
Haas had just one birdie against five bogeys on his scorecard.
"Bill didn't really play his best," Colsaerts said. "We've seen that. But I was just making sure that I was putting myself in position and maybe put a little bit of pressure on Bill. That seemed to have done the trick."
Colsaerts is making just his second appearance in this event. He lost in the first round last year but he won the Volvo World Match Play on the European Tour last year.