Morton made only his fifth first-team appearance for the Reds on Tuesday night and his second start in the Champions League, coming in a legendary arena.
Liverpool had not visited the San Siro in 13 years, and had never faced Milan at the stadium, but given the circumstances in Group B, Klopp made eight changes to his side.
Speaking to reporters after the game, Klopp revealed the “big pleasure” he took in watching his No. 80 take to the stage.
“I don’t want to make his life more complicated than it is already, when playing at such a young age for a club like Liverpool, with a performance like this,” he insisted.
“I think we should all calm down, but it was really good tonight! It was a big pleasure to watch the boy playing.
“The football knowledge, the football brain he showed tonight was absolutely exceptional.
“If you are technically on that level – and he obviously is – and you then have such good orientation, then sometimes we have enough time to do good stuff.
“That is what he did tonight. On top of that, he defended incredibly well, together with the other boys.
“I have to say it was really exceptional what Oxlade and Taki did in these half-spaces. Oxlade is in a really good moment, but Taki was not in his natural position.
“So I have to say the overall performance was really special tonight.”