Rangers player ratings as Aaron Ramsey shows his class despite defeat
Rangers took an early lead through Aaron Ramsey but Tom Rogic fired back minutes later before Cameron Carter Vickers scored shortly before half-time to turn things around.
It was a breathless Old Firm derby and despite Rangers piling on the pressure in the second half, they couldn't work Joe Hart enough to secure anything but defeat at Ibrox.
Giovanni van Bronckhorst side now find themselves six points behind their Glasgow rivals with just six games remaining as they look to retain the Premiership title.
And here's how the Rangers players rated on an afternoon to forget...
ALLAN McGREGOR : Rangers' veteran keeper came up with some huge interventions to deny Maeda and Abada but will be kicking himself after failing to push strike from namesake Callum away from danger before Rogic rammed home equaliser. 7
JAMES TAVERNIER : Did reasonably well dealing with Jota’s threat but Gers really needed their skipper to do better in the final third. Wasted a couple of set-piece chances while his deliveries from out wide lacked purpose. 6
CONNOR GOLDSON : Celtic would have enjoyed an even more comfortable day had it not been for the Englishman. Unlucky his block on Rogic in the build-up to Celtic’s first goal proved for nothing but two more huge clearances ensured the Rangers remained in the fight. 7
LEON BALOGUN : More pain for the defender after Nigeria this week missed out on World Cup qualification. Will regret not putting his header out of the danger zone as Carter-Vickers put Postecoglou’s team ahead. 6
CALVIN BASSEY: Sent a terrific ball for Kent in behind the Hoops defence as Ramsey put Gers in front but immediately undid his good work by letting Callum McGregor wriggle into the box as the visitors hit back. 6
RYAN