John Hartson has told former club Celtic that they have to respect Dundee United in Scottish Cup quarter-final action - but Ange Postecoglou's desire for silverware has them on the right path.
The Aussie will look to guide the Hoops back to Hampden in Monday's last eight clash at Tannadice.
Postecoglou has already won the Premier Sports Cup as Parkhead boss this season but a stern test awaits under the Tayside lights.
