Lee Westwood admitted he took the positives out of his Open disappointment after he made a superb start to the US PGA Championship at Oak Hill.
The 40-year-old, who held the 54-hole lead at Muirfield three weeks ago before fading on the last day, put himself back in contention for a maiden major with a flawless four-under 66.
The Englishman opened with a birdie and kept a bogey off his card as he ended the first day just one shot behind leaders Jim Furyk and Adam Scott.
"After the Open I could have looked on it as disappointing but you try and take the positives out of it and carry on," said Westwood.
"There was a bit of a backlash last week where I struggled to get into it but I managed to get my focus back again and I played very well today. If I can carry on like that hopefully I will have a chance on Sunday."
Westwood could have been out in front had he taken a number of good chances on the inward half, set up by his metronomic accuracy with his irons.
He missed a five-foot putt for birdie at 13 after play resumed following a 70-minute weather delay, and he added: "I was a bit unlucky there because when I marked my ball I noticed there was a spike mark in the way.
"I thought I could do with it raining a lot to flatten it out, but when we came back it was still there.
"My ball hit it and went left, but it was nice to birdie the 17th and 66 with no bogeys is a great way to start."