Mourinho believes Inter were unlucky to be drawn against his former club.
He said: "I always repeat the same thing, at this stage of the Champions League it all starts with a bit of luck and a bit of bad luck in the draw.
"Inter were unlucky to get Chelsea and Chelsea were unlucky to get Inter. It would have been much easier for the English team to play against Stuttgart, Olympiacos, or against other more approachable teams.
"Chelsea want to win and they think that they can. We want to win and we think that we can. The two decisive moments will be the two dates of the matches, February 24 and March 16.
"In those two moments the difference will be the injuries and suspensions."