The 55-year-old was linked with a move to replace Rui Vitoria at Benfica few days after being sacked by the Premier League outfit.
"It's a tremendous honour when you return to a club where you've been, but I'm talking to you and I will not talk to anyone else".
With Santiago Solari under pressure at the Bernabeu, Mourinho - who was sacked by Manchester United in December - emerged as a potential candidate, having left the club on good terms with president Florentino Perez in 2013, while he remains a fan favourite at Inter, after guiding them to a Serie A, Coppa Italia and Champions League Treble in 2010.
The Portuguese has denied he is set to return to the Primeira Liga by taking charge of Benfica, while returns to either Inter or Real Madrid have also been mooted.
The improved contract United agreed with Mourinho a year ago was due to run until the end of the 2019-20 season, with an option of a further season.
"There are things that have been said and I do not want to feed those rumours", he said, "but when a player or coach is asked to come back to a club it means they did something positive there".
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'And to say anything is to say that I was not invited and, if I was, the president and Benfica would be the first to know my decision. "I am fine at the moment".
"I felt that when I returned to Chelsea".
'When you leave a club, you do not wash dirty clothes, when you leave a club, you do not seek to, at least publicly, do any kind of criticism, it's an ended chapter and that's how I always did it'.
Mourinho is sure to have plenty to say about the game featuring another of his former clubs, as well as a team he has not held in the highest esteem during his time in English football.
This is according to The Sun, who add that Chelsea included a similar clause in Mourinho's contract that forced United to pay £15m when they hired him.
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