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
9. Olwethu Makhanya
A rock. The South African strolled this match. Never flustered on the ball or in a one-on-one situation. Almost capped his fine day with a goal, only for it to be ruled out for handball. 9
10. Callum McGregor
This is the poorest run of form Celtic's captain has showed for a long time. Overpowered in midfield, at times slack with passing and booked. Certainly a cause of this all-round malaise. 4 | SNS Group
12. Dan Neil
Not the aplomb of last weekend's two-goal heroics at Ibrox, but kept the Rangers midfield ticking over. Assured captain's display. 7 | Getty Images