Cole admits Mourinho transformed his game while at Stamford Bridge.
He told the Daily Express: "He knew what to say to players at the right time. It wasn't always what I wanted to hear, but it was what I needed to hear. I was a decent player before I went there. He definitely made me better, whatever the perception people have.
"He got my mentality right. He saw something in me that maybe I hadn't. He changed me from playing central midfield to playing wide and playing a bit higher up the pitch. I became more effective at both ends of the pitch.
"I can see his impact already now he is back at Chelsea. With him they are a better side already than last season. They look more solid, more together."
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