Celtic are on the road again for the quarter-finals of the Scottish Cup.
The holders have travelled to Peterhead and Inverness Caledonian Thistle in the previous two rounds and now face a trip to Dundee United.
Hearts/St Johnstone v St Mirren/Ross County
Ayr United/Falkirk v Hibernian
Motherwell v Aberdeen/Queen of the South
Ties to be played weekend of March 10-11