The Spain international has been demoted to the bench on a number of occasions under Mourinho, who publicly claimed that the 25-year-old needs to change his game in order to secure a starting place.
With Oscar chosen as Mourinho's number 10, Mata, who played in the Blues' League Cup win over Swindon Town, recently claimed that he is willing to switch positions in order to fit into the Portuguese manager's system.
"I liked the way Juan Mata played against Swindon," Mourinho said in a news conference. "His attitude is very good and his effort was good. When in a player makes an effort to come in my direction then I go to him as well.
"I can imagine from now him working into my way of thinking and I think the natural tendency will for him to be in the team."
Chelsea will take on Tottenham Hotspur at White Hart Lane tomorrow afternoon.