Rasmus Højgaard became a three time European Tour winner at the age of 20 after producing a bogey free 63 on day four of the Omega European Masters to come through the field and claim a one shot victory.
The 18th hole at Crans-sur-Sierre Golf Club proved crucial on Sunday, with Højgaard holing his nine foot birdie putt there to get to 13 under par.
He walked off the course trailing Bernd Wiesberger by one shot, but that all changed as the Austrian found the water at the last to surrender a double bogey and slip to 12 under.
Højgaard's nervous wait continued as the final three groups finished off their rounds, but with none of the remaining players able to match his 72 hole total, he was crowned King of the Mountains.
Wiesberger finished alone in second a single stroke behind Højgaard, with Henrik Stenson another shot behind on 11 under after another strong week.
Højgaard began the day four shots behind co-leaders Renato Paratore and Sean Crocker but made birdies at the first and ninth to move to eight under.
After three straight pars at the beginning of the back nine, Højgaard went birdie-eagle-birdie from the 13th to catapult himself into a share of the lead on 12 under.
But with Wiesberger also making an eagle at the 14th to move two shots clear, the Dane knew he needed to finish with a flourish to give himself a glimmer of hope.
And he did just that, saving par from seven feet on the 17th before nervelessly sinking his birdie putt at the last, having nearly holed his approach for an eagle.
He then watched on as Wiesberger found a bunker off the tee on the 18th, mishit his second shot into a pond and missed his tricky bogey putt to drop out of the lead.
And Højgaard's victory was confirmed shortly afterwards, giving him a third trophy to add to the AFRASIA BANK Mauritius Open and ISPS HANDA UK Championship titles already in his cabinet from the 2020 season.
Højgaard was delighted to get his name on a trophy which has also been won by a host of European Tour greats, including Seve Ballesteros, Colin Montgomerie and Sergio Garcia.
He said: "I'm very proud. It's very special. It's an amazing place and I can't wait to come back again.
"At the moment it's a bit surreal. I didn't expect to be in this position but it's amazing.
"I knew I had to make a birdie (at the 18th) to have a chance to maybe get in the play-off, so we were just trying to set up a chance.
"I made a birdie and then we had a bit of a strange ending. It was crazy.
"That's by far the most nervous I've been the whole day (over the putt at the 18th). But it's so nice to have the crowds back to cheer you on. That was a great moment."