Kohler, United States: Jason Day has been knocking at the door of a major triumph since he tied for second on his Masters debut in 2011.
His latest near-miss at St. Andrews last month may have given the Australian the key that will take him across the threshold.
"The last round of the Open Championship, I felt different," said Day, who finished fourth at St. Andrews after missing a birdie putt at the final hole of regulation that would have put him in the playoff.
It was a familiar feeling for a player who has three runner-up finishes in major championships and nine top-10 finishes in the 20 majors he has contested.
"I don`t know what changed but I felt more calm," Day said of the conclusion of the Open, which he followed up with a victory in the Canadian Open.
"Everything was kind of slow-paced. I played phenomenal golf at the Open, only three bogeys all week and all in the second round.
"I took that form to Canada, and an understanding of the importance of getting the finer details correct, the little things with my caddie that put my mind at ease. After that it`s just about the confidence you have."
Day, who fought through vertigo to contend at the US Open in June, has reason to have plenty of confidence heading into the final major of the season at Whistling Straits.
He tied for 10th the last time the PGA Championship was held on the Pete Dye-designed course that measures more than 7,500 yards.
"You have to drive the ball well here," said Day, who ranks third in driving distance on the PGA Tour this season.
"I played well here before, and I`ve just got to keep working at it and go out there and just try to execute and try to be the last guy standing."
That said, Day knows as well as anyone it is easier said than done on the game`s biggest stages.
"It`s very difficult to try and close on a Sunday at a major championship," he said.
"But I think the more times that I keep putting myself there, the more opportunities that I give myself, sooner or later it`s going to happen.
"I know that."