The Blues saw their Premier League title hopes take a massive blow on Saturday as bottom-of-the-table Sunderland ended Mourinho's 77-match home league unbeaten streak with a shock 2-1 victory.
However, the Portuguese manager refused to talk about their domestic situation, instead concentrating on his side's first leg against the current La Liga leaders tomorrow night.
"Today and tomorrow and also Wednesday are Champions League days and if you want to speak about the Premier League you have 19 teams in England that you can speak with," Mourinho told reporters.
"Chelsea today and tomorrow is Champions League and we are only available to speak about Champions League.
"We are lucky to be involved in the Champions League, so we are lucky that in the next two days we don't think about the Premier League and what's happened and what is going to happen because now we only think about tomorrow."
Chelsea face a potential title decider against Liverpool on Sunday before the return leg against Atletico next week.