The Blues saw their campaign end courtesy of the away goals rule following their 2-2 draw with Paris St-Germain at Stamford Bridge on Wednesday.
"The people who went out last Wednesday are the same who've been top of the league since day one," Mourinho told BBC Sport. "They are the same people who won the Capital One Cup and the same people who are going to win the Premier League."
While Mourinho was disappointed that Chelsea were knocked out in the last 16 of the Champions League, he added that his side have to move on and keep their eyes fixed on winning the Premier League.
"The only thing to speak about the Champions League is that if we win the Premier League we are top seeds next season," he said. "We closed the chapter, but we still have the book to write. We have 11 more matches to finish the book.
"Let's see if the last page of the book is with the Premier League trophy in our hands."
Chelsea's next Premier League match will against Southampton on home soil on March 15.