Muric kept a clean sheet for the 3-0 win.
He told City's website, "It was a good game, clean sheet, and I'm happy to make my debut for the first team and Man City. It's always my dream.
“I train every day hard. I'm happy for this opportunity and he believed in me to play this competition.
“I went to Holland for three weeks, they called me back and I was happy to be back in Manchester. I feel at home here.
“I was very happy [for Phil Foden] that he scored his goal and he was happy as well I think.
“I hope I will play in the next round. It's the coach's decision so we will see."