Gary Mackay-Steven inspired Aberdeen to a Scottish Cup win over his former club, Dundee United, as they took their place in the quarter-final draw.
United’s defensive tactics looked to be working until Adam Rooney headed home from point-blank range after the winger looped a volley towards goal.
Mackay-Steven slotted the second before Sam Stanton replied on the break.
But the Dons hit back through Kenny McLean’s header and Mackay-Steven fired another before a Paul McMullan strike.
It is hard to believe it is just three years since Jackie McNamara’s United beat Derek McInnes’ side in the league given the huge gap that now exists between the clubs.