(CNN) -- Peter Hedblom fired a second successive four-under-par 68 to take a one-shot lead into Sunday's final round of the Johnnie Walker Championship in Scotland.
Peter Hedblom is seeking to go one better than his second-placed finish at the KLM Open last weekend.
The Swede carded five birdies in Saturday's third round at Gleneagles, including one at his final hole, to edge ahead of halfway leader Paul Lawrie.
Home hope Lawrie dropped his first shots of the tournament as he slumped to a disappointing 73. He bogeyed the fifth and 10th holes before firing three quickfire birdies, but then surrendered further strokes at 15 and 16.
The 1999 British Open champion had been seeking to become only the third player to go through a European Tour event without dropping a stroke.
However, he finished the day on seven-under 209 to be a shot ahead of Denmark's Soren Hansen (71), Welshman Jamie Donaldson (70), France's Gregory Bourdy (71) and Scotland's Steven O'Hara -- whose 66 equaled the best round of the tournament so far.
Hedblom, who lost the KLM Open title in a play-off in Holland last weekend, was one of several players to criticize the greens at the Perthshire course.
"The scoring would be much lower if the greens were better," he said. "You know you're going to miss some short ones and you just need to keep cool -- but it's tough."
The course will host the Ryder Cup in 2014, and European captain Colin Montgomerie is confident it will be ready by then.
"They have a five-year (improvement) plan and this is the second year," said the Scot, who carded 72 to be tied for 32nd on level-par 216 in a group including two-time Masters champion Jose-Maria Olazabal.
The Spaniard suffered bogeys at his last four holes to sign for a 77, having started his round in fifth place following his 68 on Friday.