Ian Poulter declared himself satisfied with his four-under 68 on Saturday but said he will need something special on Sunday to contend for USPGA victory.
Poulter's golf was as eye-catching as his outfit at times on Saturday
The 31-year-old is eight under for 54 holes, six off the lead, and will be looking for a low number on Sunday.
"It's still a tricky course, but it's receptive after the rain and the best players in the world are here," said the English star.
"You just hope it's you who goes and shoots eight under."
Poulter, a six-time winner on the European Tour, has never finished higher than 12th in a major before and is desperate for a good result at Medinah to boost his Ryder Cup credentials.
A debutant in Bernhard Langer's victorious 2004 team, the world number 63 is way down the Ryder Cup rankings this year with only two more events after this one to go.
I don't think this is a situation (Luke Donald) is going to be uncomfortable in
But Poulter, who has played most of his golf in the US this season, did perform well at the US Open in June - his best ever result in a major - and has been impressive this week.
A strong finish on Sunday would certainly increase his chances of becoming one of captain Ian Woosnam's two wildcard selections for the K Club.
The Hitchin-born golfer would love to line up in Ireland alongside the man he correctly tipped to do well this week, Luke Donald.
The 28-year-old Englishman goes into Sunday's final round tied for the lead with Tiger Woods.
"When I played a practice round I said it was perfect for Luke and I told him when I saw him in the players' lounge," said Poulter.
"He hits it right to left, is very steady and just plods it down there. And I don't think this is a situation he is going to be uncomfortable in."