Former England skipper Terry, 32, was in and out of the team under interim manager Rafa Benitez last season -- but he has played the full 90 minutes in every league game so far this time.
Mourinho has been impressed by Terry, who scored his side's equaliser in Saturday’s 1-1 draw at Tottenham, and said: "He is a very good player, and very good players have no problems with their contracts.