Mason Greenwood wants to join AS Roma rather than Fenerbahçe or Al-Hilal.
Marseille are demanding around €55 million for the forward, as Manchester United are entitled to 40% of the transfer fee through a sell-on clause.
Meanwhile, Roma are preparing an offer expected to be worth between €45 million and €50 million.
On the other hand, Fenerbahçe have already seen a €35 million bid rejected, despite offering Greenwood an annual salary of €12 million.
