Rory McIlroy saw his lead cut to two shots as the field began to close the gap on day three of the BMW PGA Championship.
Enormous crowds had gathered at Wentworth Club for the first Rolex Series event of the season and many of them had come to see the four-time Major Championship winner after a stunning 65 on Friday handed him a three-shot lead.
A bogey on the third, however, saw him slip to 11 under and lead by just two from Frenchman Sébastien Gros and England's Sam Horsfield in much windier conditions in Surrey.
Thai Kiradech Aphibarnrat and Finn Mikko Korhonen were then three shots off the lead.
Aphibarnrat hit a stunning shot into the first to make a birdie from six feet but gave it back on the third before returning to red numbers with a 25-footer on the fourth.
Like Aphibarnrat, life is never dull with Korhonen, and he sandwiched an eagle on the fourth with a bogey on the third and a birdie on the sixth.
Once the final group got under way, both McIlroy and Horsfield hit excellent approaches into the first and while the World Number Eight missed his attempt, Horsfield holed from four feet to cut the lead to two.
McIlroy looked in big trouble when he found trees and sand with his first two shots at the third and despite a beautiful bunker shot, he could not get up and down.
The lead stayed at two, however, with Horsfield also making a bogey after a poor chip.
Gros started his round with three pars.
Marcus Kinhult set the clubhouse target at seven under after a 68 containing a pair of eagles.
The Swede's two-shot gains on the fourth and 12th sandwiched birdies on the seventh and ninth but he dropped shots on the fourth and 17th on the way home.
Defending champion Alex Noren, reigning Race to Dubai champion Tommy Fleetwood, fellow Englishman Matthew Fitzpatrick, last year's runner-up Francesco Molinari and Dane Lasse Jensen were also four off the lead playing the front nine.
