Mourinho said: "That's a private question, that's only between me and Porto because I am still involved with Porto. It's my club and I have a contract with them for two more seasons.
"I don't know if it's my last match but I do know it is the most important match of my career and something I've worked on for two years."
Mourinho added: "I said a few weeks ago I don't want to know anything about other clubs, presidents or agents. If you ask the players they will say exactly the same.
"Everyone is fully concentrated on this match. It deserves 100% from us and I must be an example to the players."