Manchester United have confirmed that Mason Mount has left the club permanently to join Marseille.
The 22-year-old spent last season on loan at Getafe in Spain.
Greenwood leaves United after making 129 appearances and scoring 35 goals.
A club statement read: “We wish Mason all the best in his future career.”
It is believed the transfer fee is a €26 million fixed fee, €5 million add-ons and a 50 per cent sell-on clause for the Red Devils.
Greenwood will wear the No. 10 shirt for the Ligue 1 side.