Neil McCann conceded Rangers ’ penalty awarded by referee Steven McLean against Dundee "is of the soft variety".
Gio van Bronckhorst’s side cruised into the semi-final stage of the Scottish Cup thanks to goals from Connor Goldson and Fashion Sakala, alongside a James Tavernier spot kick.
Ahead of Tavernier's penalty, Ryan Sweeney looked to have body-checked the Ibrox skipper with whistler McLean awarding the foul.