Wade Ormsby blitzed the back nine on his way to a 9-under-par 61 at the KLM Open and joined Paul Lawrie in the first-round lead at the Kennemer Golf and Country Club on the Dutch North Sea coast on Thursday.
The Australian fired six birdies on the last seven holes, including 16, 17 and 18, to surge up the leaderboard.
Hours earlier, and playing the back nine first, 1999 British Open champion Lawrie eagled the par-five 12th and birdied 16, 17 and 18, too.
In the group behind Ormsby, Richard Bland of England gave himself a chance of shooting the European Tour's first 59. Bland was 8 under with the last three holes to play, but parred them all to finish the round alone in second place.