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Jonathan Sutherland presents highlights of today's two Scottish Cup sixth-round matches, with a place in the semi-finals at Hampden Park beckoning. Last season's beaten finalists Dundee United welcome the 2013 cup winners Celtic to Tannadice a week before the clubs face each other in the League Cup final. United have had to cope with losing Gary Mackay-Steven and Stuart Armstrong to Celtic during the January transfer window, and manager Jackie McNamara will be keen to knock out the club with whom he won the Scottish Cup three times as a player.

In the day's other game, League Two club Berwick Rangers play their first Scottish Cup quarter-final for 35 years as they travel to Hibernian.

Plus a round-up of all the weekend's cup action and Premiership matches, with analysis from Pat Nevin and Michael Stewart.