Pennsylvania: Briton Justin Rose tamed the tough Aronimink course with a commanding display to earn a four-shot lead after the third round of the AT&T National on Saturday.
Rose, who made just one bogey in a three-under-par round of 67 in bone-dry afternoon heat, moved within sight of his second victory in three starts on a 10-under total of 200.
"Today was a really good round in a lot of ways," Rose told reporters.
Burly Swede Carl Pettersson (65) shot the day`s best score to move into a tie for second with South Korea`s Charlie Wi (70) on six-under, while Tiger Woods`s title defence is all but over, the American falling 13 shots off the pace after posting a 70.
Rose, a stand-out on the U.S. Tour in recent weeks, has some demons to contend with having surrendered a three-shot lead going into the final round in Hartford last week.
His final-round freeze scuttled his bid for two wins in two starts after he won the Memorial last month, his first PGA Tour victory.
"My game wasn`t that good at Hartford," he said. "I feel a lot more comfortable with more aspects of my game this week."
"Tomorrow, the challenge is to be as loose as possible. I`m more excited to put into play the lessons I learnt at Hartford. What I`m doing well is not carrying any baggage over from one week to the next."
Pettersson, meanwhile, surged into contention with the day`s best score.
"I putted well but that`s what you`ve got to do around here," he said. "I missed quite a few greens on the front but on the back I played more solid."
Wi spoke about the possibility of his maiden victory on the PGA Tour.
"I`ve won numerous times overseas but still the PGA is the toughest tour in the world," he said. "You give yourself enough chances and you`ll break through."
Woods recovered from a dreadful start -- three early bogeys -- and was upbeat after his round.
"I turned it around starting at (the eighth hole). From then on I hit some really good shots," he said.