The Spanish playmaker, in Brazil with his country ahead of the Confederations Cup, was Chelsea's player of the year as they lifted the Europa League and finished third in the Barclays Premier League.
Surprisingly, some reports have suggested new Blues boss Mourinho has told clubs on the continent that Mata is available for transfer.
The 25-year-old has heard nothing of the sort, though, and will wait until he meets the Portuguese before judging the stories.
"Nobody at Chelsea has told me that Mourinho wants me out," he said in quotes carried by Spanish sports publication Marca.
"When I finished the season I was told that they were very happy with my performances and with the two years I've spent with the club.
"I have three years left on my contract. I'm very happy with Chelsea.
"Mourinho? I'd prefer to wait until I meet him and work with him before I judge him. That's simple logic."
Mata joined Chelsea from Valencia in 2011 and has established himself as one of the Premier League's leading players.
- Sports & Recreation