WENTWORTH, UK — Andrew Johnson holed-in-one on the first day of the European PGA Championship here Thursday and won himself a new car. Johnson aced the par-3 168-meter 10th hole using a seven-iron earning himself a BMW M4 worth approximately 70,000 euros. It was the second hole-in-one of his career and the 30th on the European Tour this season. The 26-year old Johnson was still struggling on four-over par after 13 holes despite the eagle, nine shots of the early pace set by Sweden's Robert Karlsson who had a 67. Defending champion Rory McIlroy shot a 1-under 71, eaving him four shots behind clubhouse leader Robert Karlsson. Playing for the fourth straight week, the top-ranked McIlroy failed to recapture the form that saw him surge to a record seven-shot victory at the Wells Fargo Championship at Quail Hollow last week. McIlroy had two birdies and two bogeys in his first five holes, missing at 12-foot putt for par at the first hole after failing to find the green with his approach. He went birdie-bogey-birdie from Nos. 12-14, and could not take advantage of par-5s on the final two holes. Karlsson made six birdies for a round of 67. The Swede birdied two of the final three holes to take the overall lead in the European Tour's flagship event. “It was nice to put a good round together,” Karlsson said. “I was careful off the tee. It is important round here to keep the ball in play. Hopefully this is the start of a good run.” Karlsson was one shot ahead of four players — Miguel Angel Jimenez, Jorge Campillo, Chris Wood and Y.E. Yang. Stephen Gallacher of Scotland was forced to withdraw from the competition, shortly before he was scheduled to tee off with Lee Westwood and Tommy Fleetwood. Gallacher, who was part of Europe's 2014 Ryder Cup-winning team, has a wrist injury. — Agencies