"When it came out of the hat it was a draw you thought was set up for it [an upset]," said Pulis, the Stoke manager.
"I thought we started really slow and couldn't get into the game. When they scored you think 'blimey, let's hope we're not on the end of one'.
"But from that point we gradually took over, we missed some great chances before we actually scored the opening goal.
"After Cammy scored it was a case of making sure we kept nice and steady. We knew we'd have to defend a lot of balls in the box and we did that with Robert Huth and Ryan Shawcross, who were fantastic today."