Mourinho brought Zouma to Stamford Bridge from St. Etienne in 2014.
And the Frenchman has provided an insight into how master psychologist Mourinho motivates his players.
"I cannot remember which match we were playing, we were losing 3-1, away from home," Zouma told RMC Sport.
"The following day, he [Mourinho] catches up with me, he takes me to his office, and he asks me if I am ok. I said yes, he asked me if I was sure.
"I said yes again, he replied 'Because you were rubbish this weekend.' Like that, direct. It shocked me, but it made me want to immediately respond on the pitch.
"I remember that it hurt me, that it affected me. But I really wanted to show him that I could react."
He added: "He is someone who loves victory. He uses all the tools possible to achieve it.
"I came here at 19 and he played me. I was able to have my chances, I played my matches.
"I don't know what other people think, we all have different opinions, but from my side, I don't really agree [with the notion that Mourinho does not give young players a chance]."