Romain Langasque landed his maiden European Tour title at the ISPS Handa Wales Open at Celtic Manor.
Langasque, 25, carded a flawless final-round 65 to overturn a five-stroke deficit starting the day into a two-stroke victory on 8-under par.
The Frenchman, who won the 2015 Amateur Championship, enters the winner's circle in his 78th event on the European Tour and vaults into the top 100 in the world rankings for the second time in his career.
The win also books Langasque's spot in next month's US Open.
"Everything in golf can go so quick," said Langasque.
"I’m really happy, this is where we all want to be. Now I’ll have some good opportunities. I need to focus again, but it’s where I’m looking forward to go.
"Playing my first US Open this year, the good thing is with no public there’s less pressure on it being my first one. I’m really proud of myself."
ROMAIN LANGASQUE WITB
- SIM Driver | 8° | Tensei AV White 65 TX
- SIM Max Fairway | 15° GD XC 7X
- M6 Fairway | 18° | GD VR 8X
- P•760 | 3-4 Iron | Project X 6.5
- P•7MC | 5-PW | Project X 6.5
- Hi Toe Wedge | 52° & 58° | KBS 610 125
- Spider X Navy
- TP5x Golf Ball
Finland's Sami Valimaki finished in second on 6-under par, with English duo Matthew Jordan and David Dixon in tied third on 5-under par.
Sweden's Sebastian Soderberg needed a birdie up the par-5 18th to force a playoff, but he spun his third shot into the water en route to a disastrous triple-bogey eight to finish tied fifth.
Scotland's Connor Syme led by one with six holes to play but had a finish to forget with bogeys at 14, 16 and a double-bogey at 18 after topping his third shot into the water.
The consolation for Syme is that he books his place in the US Open.