Copenhagen come to Leicester as the closest rival to Claudio Ranieri's team in Group G and not opponents to be underestimated.
Operating in a 4-4-2 system with a clear style and players understanding roles, the Danish champions sound a lot like their English counterparts and arrive off the back of a 23-game unbeaten run.
With victory, Leicester can move to within touching distance of the Champions League knock-out phase but that might be harder than expected, as Sportsmail explains.
How great a threat do Copenhagen pose to Leicester?