The Sky Blues were held to a goalless draw on Boxing Day, as they shared the points with Michael O'Neill's Stoke City.
Both sides created chances, with City going closest through Matty Godden and Callum O'Hare, whilst up the other end, Jordan Thompson hit the bar and Steven Fletcher headed wide.
The point leaves Mark Robins' side 18th in the Championship, with a trip to Preston North End next on the agenda.