At only 23 years old, the Brazil global is seen as a long-term replacement to Michael Carrick and the final piece to Mourinho's midfield puzzle to give United to impenetrable spine to the team, following the signing of Victor Lindelof this summer, and Pogba and Eric Bailly 12 months ago.
Fabinho looks set to be just one of United's big-money signings this summer, with Mourinho already snapping up defender Victor Lindelof from Benfica last week.
"I would first talk to my agent, Monaco too, to decide everything right, but it's a great club".
Jose Mourinho will be pleased as punch, having been a long-time admirer of the Brazilian midfielder, who was an important member of Monaco's Ligue 1 winning side last season.
Mourinho is looking to strengthen the core of his team at Old Trafford this summer as United prepares to compete for the Premier League title and in the Champions League next season.
Leonardo Jardim's side also made it to the Champions League semi-final, which they lost to competition runners-up Juventus. Fabinho wants the move crucially and we need a new defensive midfielder who can also pass it out from the back - ticks in those two boxes and the fact he can operate happily as a right-back is a massive bonus.
Alvaro Morata, the Real Madrid striker, is among the reported targets.
The Brazil global has been regularly linked with a move to Old Trafford since Jose Mourinho took over the reins at the 20-time English champions.