Mourinho is under pressure after their shock defeat to Real Betis on Saturday.
He said: "I feel good, I am in perfect health and working as I have done for many years.
"I do not understand the question about my relationship with the club - it is the same as ever.
"My relationship with the players is the same as always. It naturally depends on results. When you win, naturally things are better than when you lose. But everything is normal."
He added: "I am simply an employee of the club, like everyone else. I do my best. At the end of the season, we can make calm judgments.
"It is possible that at the end of the season the club are not happy with my work. I am here giving my all as always.
"The most important thing for me is that I continue to have a strong personal relationship with the president, just as I had with Abramovich (at Chelsea) and Moratti (at Inter)."