Sport said United were hoping to persuade Messi to wind down his contract at Barcelona and move to them on a free transfer in 2018.
The Swede joined on a one-year deal, as per United's policy regarding players over the age of 30, but Mourinho indicated that United would be taking up the option of a second year. But Mourinho flatly turned down even the prospect of United attempting such a coup.
"It's the same story every season, that he's going to leave", he told reporters at a press conference held prior to Thursday's (24 November) pivotal Europa League clash with Dutch giants Feyenoord at Old Trafford.
Argentina boss Edgardo Bauza has hit back at claims that Lionel Messi has a say on team selection.
"I think it would be attractive for him to start and finish his career at Barcelona".
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From Gaga's chic white suit to Gigi's lacy gown, check out the best-dressed stars of the night in the slide show above. Though the red carpet area was covered with a tent, the carpet itself is soaked and some starlets are shivering.
Adidas is now sponsoring Man Utd £75 million (RM414mil) a season and are anxious about the team's performance on field and it's only natural for them to be concerned that United's lack of success could jeopardise their brand.
And that confidence has now exploded following the Spanish champions' failure to convince the 29-year-old to sign a new contract.
In a rather freakish move, United kit manufacturers Adidas are anxious about the status of the club and fear that a Messi move to Manchester City would decrease the ever declining United stock. Nonetheless, some of the biggest clubs in Europe are keeping tabs on the situation. Ligue 1 side Paris Saint-Germain could also jump on any opportunity to sign a player of Messi's calibre.
Or will Man Utd and Adidas be successful in their conquest and we might just see Messi don a Red Devil jersey in the future?