Rangers cut the gap at the top of the Premiership to two points after winning 1-0 away to Celtic.
Derek McInnes’ men recorded their second Old Firm win within seven days, backing up last weekend’s 3-0 Premier Sports Cup triumph at Ibrox with this deserved triumph in the league.
German striker Ryan Naderi scored the only goal of the game on 33 minutes, reacting quickest inside the penalty box to net after Kim Minsu’s strike was parried back into the danger area by Celtic goalkeeper Viljami Sinisalo.
Rangers created the better of the chances and had a second-half goal by Olwethu Makhanya disallowed for handball in the build-up.
Rangers remain in second place in the standings, but are now just two points behind the champions, who suffered their first league defeat of the campaign.
The spotlight will now fall on Celtic boss Martin O’Neill, who has presided over three poor defeats in the space of a week.
The domestic game now shuts down for three weeks, with an international break coming up.
We give the players a mark out of ten for their performances at Celtic Park.
. GLASGOW, SCOTLAND - SEPTEMBER 20: Rangers' Ryan Naderi (L) celebrates scoring to make it 1-0 during a William Hill Premiership match between Celtic and Rangers at Celtic Park, on September 20, 2026, in Glasgow, Scotland. (Photo by Craig Williamson / SNS Group)
Ryan Naderi, left, scored the winning goal for Rangers at Celtic Park. | SNS Group
1. Viljami Sinisalo
Steady enough - but should he have parried Kim's strike from distance wide rather than back into the danger area? 5 | SNS Group
2. Ivor Pandur
Brilliant save to deny Donovan at start of second half - but that was his only requirement on a quiet away Old Firm outing. 7
3. Colby Donovan
Tested defensively by Gassama's pace. Had Celtic's best chance when he saw his 46th-minute header clawed away by Pandur. 6 | SNS Group
4. Cameron Carter-Vickers
Great block to stop Kelsy netbound strike. One of Celtic's better players up against a physical Rangers forward line. 6 | PA