Mourinho doesn't believe his squad needs major surgery.
He said: "It isn't easy to do better in the Champions League, but it's possible, so we'll try. We don't want or need a new squad. Two players will suffice to make the team stronger.
"Regarding the departure of players, I can't even guarantee I'll be here next year; maybe we play a horrible game tomorrow and the President fires me. I've thanked all my men, but football has these things. They all worked towards winning the title and my way of thanking them is to welcome all of them back next season."