Dundee United manager Peter Houston was not surprised his team had to battle to reach the quarter-finals of the Co-operative Insurance Cup following a narrow 2-1 win at Ross County after extra-time.
After a goalless but eventful first half, which County shaded, man-of-the-match David Goodwillie gave United the lead from the penalty spot after he was taken down in the box by Paul Lawson.
But with just four minutes left on the clock Iain Vigurs finished off a superb move involving Scott Morrison and Garry Wood to force extra-time.
The winning goal in the 99th minute was lucky as Scott Robertson's ball across the face of goal flew off Scott Boyd's knee past goalkeeper Michael McGovern.
Houston said; "Great credit to Ross County - we knew they were a good side - they have not changed a lot since last season. They pass the ball well and are at you all the time. They are very fit and work hard, which shows you how much effort we've had to put into the game."
He added: "We had four massive players missing but it shows you Dundee United's character. I'm over the moon with the guys - the main thing is we got through."