Zakuani saw his side fall to a 3-1 defeat against Jose Mourinho's expensive XI and couldn't believe his ears when Zlatan started organising his team-mates.
He told the BBC World Service: “He talks a lot on the pitch, but he talks a bit like a robot, kind of like Terminator.
“It's sort of in slow motion. You can see his influence on their team. He'll tell a few of the players that are rushing past him to just calm down and relax on the ball.
“You can see straight away that he has the respect of everyone at the club."