Terry had spells out of the team under Rafa Benitez last term, but has regained his position as a mainstay of the side since Mourinho's return to Stamford Bridge.
Mourinho said: "I was not expecting him to be the best centre-half in England. Not after the season he had last year. I was not expecting it.
"I would like to see him playing this way until the end of the season.
"People talk about England and the World Cup is between him and Roy [Hodgson], not with me."
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