The 20-year-old defender has struggled for playing time behind Thiago Silva and David Luiz at the Parc des Princes this season and has been used as a right-back at times by head coach Laurent Blanc.
His current situation has resulted in speculation that he could leave the club and move to Old Trafford, with the Premier League side in need of defensive reinforcements, an eventuality his representative has refused to rule out.
“A number of clubs are asking about him; Manchester United are amongst them,” Bertolucci confirmed to Le Parisien.
“He respects the decisions of his coach but he simply wants to play more and spend less time with the substitutes.
“He’s ready to play right-back or defensive midfield if he must. He’s already done it with Roma and even Brazil.
“He will become the best defender in the world. He’s just as good as Thiago Silva and David Luiz.”
Marquinhos has made over 50 first-team appearances for PSG since joining the club from Roma in a £23.4 million deal in the summer of 2013.
PSG are not believed to be ready to allow the youngster to depart, however, with their asking price reportedly set at a world-record £112m.