This is according to the Daily Star, who cite French sources as claiming PSG are keen to keep the Brazilian centre-back at the Parc des Princes unless they receive a huge offer from the Red Devils.
United are believed to have tabled a £35 million bid for the 20-year-old in recent days, but that offer has been rejected by the oil-rich Ligue 1 champions.
Although Marquinhos currently finds himself behind fellow Brazilians David Luiz and Thiago Silva in the PSG pecking order, the French giants are under no obligation to sell the highly-rated defender who joined the club in a £26 million deal from AS Roma in 2013.
However, selling Marquinhos would be one way to help PSG fall in line with UEFA’s Financial Fair Play regulations. The Parisians were handed a £20 million fine for breaching FFP regulations last year and will be keen to avoid an even more severe punishment in 2015.
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PSG want £112m
The £50 million figure cited by French sources, however, pales in comparison to PSG’s reported asking price - a whopping £112 million.
PSG feel the young defender is worth such an astronomical fee because of his talent and, more importantly, his immense potential. This is a player many believe could become the world’s best within a mater of years.
United boss Louis van Gaal is clearly a fan of Marquinhos, but whether he will give the green light for the Red Devils to submit a £50 million offer before the end of play today seems unlikely.
Hours left to go
And even if he does, that would leave a matter of hours for Manchester United to thrash out a deal with both the player and his agent.
It seems likely that United will finish the day without making any major signings this winter.
Former Barcelona goalkeeper Victor Valdes joined the Red Devils as a free agent last month, while former Manchester City defender Sadiq El Fitouri has joined Manchester United’s Under-21 side from Salford City FC.