Mourinho, 53, is currently out of work since being fired by Chelsea in December, but is widely expected to replace Louis van Gaal at United in the summer.
And should the Portuguese take charge at Old Trafford, he'll reportedly have the chance to sign 22-year-old midfielder and compatriot Gomes for £35million.
The Serie A club are said to have recently turned down United's £22m bid for winger Federico Bernardeschi, but could be open to inserting Rashford in future negotiations.
The young striker has burst onto the scene this season, scoring six goals since making his senior debut for United in February.
Marcus Rashford - 5 things you need to know
GETTY
Manchester United or Tottenham could sign Lassana Diarra on a free this summer
That is according to French news outlet L’Equipe, who claim the 31-year-old France international could leave on a free deal this summer.
Diarra signed a four-year deal at Marseille last year, but reportedly made a verbal agreement with club president Vincent Labrune that he could be sold for nothing after a season should he want to leave.
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