The reigning Premier League champions earned a 1-0 win over Copenhagen at the King Power Stadium in Group G this evening.
Riyad Mahrez's 40th-minute goal means that Claudio Ranieri's men need just one more win to secure a place in the last 16 of the competition.
"That was a stern test," Morgan told BT Sport. "They're very physical, two banks of four, difficult to break down. Unbelievable atmosphere once again. The crowd really turned out and cheered us on, even the Copenhagen fans were fantastic. It's nights like this you live for."