A superb 62 for Guido Migliozzi on the final day saw the Italian take victory in the Open de France to land a third DP World Tour title.
Migliozzi, who was 13 strokes off the halfway lead, was bogey free on Sunday, with a nine-under-par round taking him to 16 under for the tournament.
It was enough to topple Rasmus Hojgaard from the top of the leaderboard, after the Dane led overnight despite having a quintuple bogey in his third round.
Hojgaard closed out his week with a 68 to finish at 15 under, making a birdie two at the second hole, where his shocking eight came on Saturday.
Migliozzi put himself on course for victory with five consecutive birdies from the sixth, including one from 35 feet at the seventh, and three more in succession from the 13th, with another gain on the par-four 18th giving him the outright lead.
His score on Sunday matched the course record at Le Golf National, which had also been tied by Hojgaard in the first round.
Hojgaard's failure to produce a chip-in birdie on the last handed victory to Migliozzi, who earns €510,000 for the win.
Thomas Pieters, George Coetzee and Paul Barjon finished five strokes behind the champion in a share of third, ahead of Jamie Donaldson.