Celtic had some positive moments at the San Siro, but were unable to hold on to an early lead as AC Milan produced a superb comeback to win 4-2 in the Europa League encounter.
Celtic fans were desperate for a reaction after a shock 2-0 defeat to Ross County in the Scottish League Cup at the weekend, and their side made the perfect start as Tom Rogic (7) capitalised on Rade Krunic’s error to fire the visitors ahead.
Odsonne Edouard (14) added a quick second with a chipped finish as Celtic took advantage of a positive spell.
The result, coupled with Lille’s own 2-1 comeback win against Sparta Prague means Milan have qualified for the knockout rounds.
It will be a battle between the two for top spot in next week’s final group games, with Celtic still bottom of Group H.