England's David Horsey recovered from a front-nine collapse to force a play-off against Damien McGrane before pushing on to victory at the Russian Open.
The 29-year-old from Alderley Edge shared the overnight lead with Peter Whiteford heading into the final round at the Tseleevo Golf and Polo Club in Moscow, but both men tumbled out of the top spots while McGrane was cutting through the pack with seven birdies.
The Irishman looked set to beat Scott Jamieson, who finished 12-under for the tournament, by two strokes, yet he bogeyed the 18th as Horsey found a birdie and an eagle in his last four holes to reel in the clubhouse leader.
Only one play-off hole was needed. McGrane found the greenside bunker on 18 before missing his putt from 10 feet, and Horsey duly wrapped up his third European Tour win - and his first for over three years - by two-putting for the win.
Horsey, who carded 72 on Sunday, admitted he thought he had let the prize money slip through his fingers before before chipping in from just off the green for a crucial eagle on the par-five 17th.
After winning his first trophy since April 2011, he told Sky Sports: "Relieved is the word that sums it up.
"I had a bit of a mare on a couple of holes over the back nine and didn't really know where I was in the tournament until 17.
"I suddenly realised I was only three behind but needed to do something drastic quite quickly. I managed to chip in and, while I was trying to make birdie at the last, I didn't realise he'd dropped one.
"I got up and down to get in the play-off and I was fortunate to win that."
Hampshire's Sam Hutsby finished particularly strongly in the Russian capital, the 25-year-old signing for a four-under 68 to take fourth place ahead of Whiteford, whose three-over final round saw him mix four bogeys with a birdie on 17.
Krister Eriksson of Sweden and Belgium's Thomas Pieters were tied for sixth place at nine-under for the tournament, while Italy's Andrea Pavan could not build on his Saturday score of 64, instead coming back to the clubhouse in 72 to take a share of eighth place with Maximilian Kieffer of Germany.