Resolute Rangers kept Celtic's champagne on ice but a gripping derby draw leaves Ange Postecoglou's side tantalisingly close to title glory.
The Premiership leaders set a course for their 10th title in 11 years when Jota's volley ignited Celtic Park but Fashion Sakala's second-half equaliser earned the reigning champions a point.
Giovanni van Bronckhorst's side could well have claimed the maximum spoils they desperately needed in the final minutes were it not for Joe Hart and then the width of Celtic's post.
