Rangers battled to a point at Parkhead as Fashion Sakala 's strike leaves Celtic waiting to wrap up the league title.
Gio van Bronckhorst 's team knew they needed a win to stand any real chance of flipping a commanding lead but they were left fighting an uphill battle when Jota volleyed home early on.
It was a shaky first half performance from Rangers that could have got out of hand but they held on and battled back after the break.
