Two years after a five-man, five-hole play-off was necessary to decide the Johnnie Walker Championship at Gleneagles, extra holes again looked on the cards midway through the final round.
Home favourite Stephen Gallacher, England's Tommy Fleetwood and Argentina's Emiliano Grillo shared the lead on 17 under par, with Ricardo Gonzalez and Bernd Wiesberger a shot behind.
Fleetwood and Gonzalez had shared the lead overnight only for Gonzalez to run up a double-bogey six on the first hole after carving his second shot 50 yards right of the green and losing the ball.
Seeking his first European Tour title, Fleetwood made the ideal start with a birdie on the par five second to move two shots clear, but Gallacher bounced back from a bogey on the first with an eagle from long range on the second.
Gallacher, whose participation has been in doubt all week due to a back injury suffered while washing his car on Monday, also birdied the fifth, eighth and ninth to join Fleetwood at the top of the leaderboard.
Grillo was in line to set the clubhouse target, the 20 year old going to the turn in 32 and picking up further shots at the 12th, 14th and 15th.
A roller-coaster afternoon took another twist when Gonzalez required treatment on an apparent knee injury from The European Tour physios, the 43 year old then saving par on the 13th after missing the green.
England's Paul Waring joined Grillo in the clubhouse on 16 under after completing a 67, but moments later Wiesberger moved to 17 under by chipping in for an eagle from just short of the green on the par five 16th.