Man United entered talks with Mendes once Ronaldo was available, quickly striking a deal before deadline day.
But the Premier League giants also had another player on their minds during talks with Ronaldo and Co.
The club are thought to have asked about his availability.
This news comes as the Barcelona starlet enters the final year of his current contract.
The report adds that Fati was attracted to the proposed move, but Barca ruled out the sale of their No.7.
Man United are not the only side in for the 18-year-old as further reports suggest he has been offered to Manchester City.
That's according to Diario Sport, who claim that Mendes is pressuring the powers that be at the Nou Camp into renewing Fati's contract by teasing his services to former Barcelona boss Pep Guardiola.
Barca lost the services of academy graduate Ilaix Moriba during the transfer window, with the Spanish outfit facing a battle to keep Fati.
Will he leave the club next summer when his contract expires? Watch this space.
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