David Higgins finished in a share of second place as France's Julien Quesne claimed his second European Tour title thanks to a brilliant finish in the Italian Open in Turin.
Quesne began the day four shots off the lead and looked out of contention when he ran up a double-bogey six on the second, but birdied the fourth and sixth and then stormed home in 31.
The 33-year-old picked up shots at the 10th, 11th and 15th before chipping in from short of the 17th green and holing from six feet for another birdie on the last to complete a closing 67.
That set the clubhouse target on 12 under par just moments before overnight leader Marcus Fraser, who was also 12 under, three-putted the 15th and dropped another shot on the par-three 16th after missing the green from the tee.
Fraser eventually signed for a 74 to finish joint eighth on nine under, leaving Ireland's Higgins and England's Steve Webster to share second on 11 under.
Higgins, who had managed just one previous top-three finish in more than 200 European Tour events, had birdied the 18th to match playing partner Webster's closing 68, the 2005 champion having threatened to claim his second Italian Open title when he holed from 60 feet across the 17th green.
Club member Francesco Molinari briefly threatened a fairytale victory when he recovered from two early bogeys by holing a bunker shot on the eighth and making a birdie on the ninth, but the Ryder Cup star stumbled home in 39 to finish seven under.
Simon Thornton was next best of the Irish finishing in a tie for 16th place on seven under, while Damien McGrane finished on level par.