MARANA, Ariz. -- England's Justin Rose, a No. 2 seed, won a tight match against 15th-seeded K.J. Choi of Korea, 2 and 1, in the first round.
Rose now advances to play Belgium Nicolas Colsaerts in the second round.
Rose entered the day 2 up through nine holes but saw his lead quickly evaporate with bogeys at the 10th and 12th holes.
With the match all squared, both players birdied the par-5 13th and parred the par-4 14th. But Rose regained the advantage by converting a 23-foot birdie putt at the par-4 15th while Choi failed to roll in his 11-footer for birdie.
"I said at the beginning of the week, it comes down to that one moment in the round where you need to make something happen, and that moment for me was on 15," Rose said. "... I was looking like I was going 1 down.
"... To make a putt when I really needed it feels good, and I felt like that's what I've begun to do a lot recently."
Rose then put the match away by winning the 17th hole after Choi had trouble off the tee. He now has a chance to advance past the second round for just the second time in his eight appearances here.
"It'll be a tough game," Rose said of his match against Colsaerts, 'but obviously one that I'm looking forward to, and I'll have to make some birdies."