Shortly after rolling home a birdie putt at 18 on Saturday to move level with Francesco Molinari atop the BMW PGA Championship leaderboard, Byeong-hun An said his game plan for the final day was to "just keep doing what I'm doing".
He didn't stick to that strategy. He went to a whole new level.
A stunning display of ball-striking from the 23-year-old saw him peel away from Molinari and the chasing pack to replace Rory McIlroy as the holder of the European Tour's flagship title, a round-of-the-day 65 taking him to 21-under-par overall - breaking the previous tournament low of 19-under, set by Anders Hansen in 2002 and matched by Scott Drummond - another debutant winner - two years later.