A late goal from substitute Adam Rooney booked Aberdeen’s place in the semi-final of the Scottish League Cup at the expense of St Johnstone at Pittodrie.
Kenny McLean passed up the hosts’ best chance earlier when he volleyed over.
Saints’ David Wotherspoon had a goal ruled out for offside, before his free-kick late on was pushed onto the bar by Dons goalkeeper Joe Lewis.
That proved crucial as Graeme Shinnie crossed for Rooney to head home in the final minute of normal time.
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