France's Romain Langasque overturned a five-shot deficit to win his first European Tour title in the ISPS Handa Wales Open.
Langasque carded six birdies and no bogeys in a superb closing 65 at Celtic Manor to finish eight-under-par and two shots ahead of Finland's Sami Valimaki, with England's David Dixon and Matthew Jordan a shot further back.
Sweden's Sebastian Soderberg needed to birdie the 18th to force a play-off but ran up a triple bogey eight after spinning his third shot back into the water.
Scotland's Connor Syme, who shared the overnight lead with Soderberg, also found the water on the last to double bogey and slip into a tie for eighth.
Cormac Sharvin endured his worst round of the tournament - a five-over-par 76 - but still finished as the best placed Irish player on five-over in a tie for 63rd.
Paul Dunne closed with a 73 to sign off on eight-over, one ahead of Jonathan Caldwell, who also carded a 76 on Sunday.