Dundee United are through to the quarter-finals of the William Hill Scottish Cup after beating St Mirren 2-1 at Tannadice on Sunday.
Teenager Ryan Gauld gave Jackie McNamara's men the lead with a close-range finish midway through the first half but Kenny McLean equalised from the penalty spot five minutes later.
Nadir Ciftci headed the winner early in the second half to send United into the last eight on the weekend of March 8.