Brazilian media outlet Globo Esporte has previously revealed that Red Devils have approached their French counterparts Paris Saint-Germain to ask about the availability of the Brazilian winger who almost joined Manchester United in 2012.
Factor in United's need for a right-sided winger and the deal seems like a no-brainer, but a lot of United fans on Twitter have one reason why they don't want Moura.
It is believed that a sum in the range of €25 million will be agreed by the two clubs.
PSG, however, are not interested in a temporary deal and have set Lucas' asking price at €40 million (£35m).More news: HTC Vive Pro revealed alongside Vive Wireless Adaptor
Moura's career has stalled at PSG after five years with the team, and United are desperate to add creative verve to their wide positions.
Moura has not started a Ligue 1 game for the French giants this season and has played for just over an hour from the bench in his six appearances.
Lucas Moura has had a bit-part role at PSG this season.
But according to the Brazilian publication, their sources from within Sao Paulo are not convinced Moura is on his way to Manchester.
Mourinho has seen his free-flowing United side splutter in recent weeks as Premier League leaders City pull ever further away in the race for the title.