The report claims that the Red Devils have put Mata, Bastian Schweinsteiger, Marcos Rojo and Daley Blind up for sale.
The four players in mention have been deemed surplus to requirements and offers will be listened to.
United reportedly want to free up funds to bring in Juventus midfielder Paul Pogba for what would be a £100 million world record deal.
The Express claim that United are willing to accept £20 million offers for Mata and he has no shortage of suitors.
Turkish giants Fenerbahce are interested in the Mata and are in pursuit of a new attacking midfielder with Diego Ribas set to leave.
The Yellow Canaries would be able to offer the 28-year-old regular first team and Champions League football next season were he to make the move.