The Sun says Mata he Spanish World Cup winner is thought to have told the United boss he is “desperate" to stay at Old Trafford.
The 28-year-old has two years left on his current £130,000-a-week deal but is keen to tie-up an extension.
A United source said: “There have been talks, but Juan is still in the dark over his future at the club.
"He is desperate to stay and likes his life in the Manchester area. It is all down to Jose's decision now.
"United don't want to leave this one rumbling though and are keen to sort it before the New Year."