MARANA, Ariz. -- Defending champion Hunter Mahan, a No. 6 seed, beat Richard Sterne of South Africa, 4 and 3, in the second round.
Mahan has now won 10 of his last 11 matches at Dove Mountain dating back to 2011.
"Confidence is high," Mahan said. "I know I can play this place well, and I know I can beat anybody on any given day."
Mahan got off to a quick start Friday with birdies on his first two holes. But he lost the fifth and sixth holes. The match was all square after Mahan's second bogey of the day at the ninth hole.
But then Sterne, a 14th seed, suffered bogeys at the 10th and 11th holes, and Mahan followed that with a birdie at the par-3 12th when his tee shot landed inside of 7 feet.
Mahan then won his fourth consecutive hole at the par-5 13th when Sterne conceded a 10-1/2 foot eagle putt. That put Mahan 4 up.
"I was able to put the pressure kind of on my opponent once I got going on the back nine with the first four holes there," Mahan said. "That was obviously key and important."
SCORECARD STATS: Mahan carded four birdies, two bogeys and a had a conceded eagle. Sterne carded three birdies and three bogeys.
HOLES WON: Mahan won six holes. Sterne won two holes.
NEXT OPPONENT: Mahan plays Martin Kaymer in the third round of the Player bracket.