Essien admits he feels strong after a decent six months on-loan at Real Madrid.
"If you'd asked me at the time, I didn't know how much I would play," Essien told the London Evening Standard. "But anytime Mourinho needs me, he will call on me and I will do my best to help him and the team.
"I have played in a lot of different positions and I have just been happy to be involved. I have played in defence and midfield and they have been different challenges. I haven't played in goal yet but I'd give it a try if they asked me!"