According to Ferdinand, Simeone is a fantastic manager, adding that he is a huge competitor.
Simeone saw his team eliminated from the Champions League last-8 final tie against RB Leipzig on Thursday night.
“He’s a lunatic!” Ferdinand told BT Sport.
“You can watch him on his own; he’s like a soap opera on his own.
“You can stand there and watch him and he will talk you through the emotions just by watching him.
“He is such a huge competitor, a bit like when he played, but his team reflects his personality and that is the sign of a fantastic manager.”