The Belgian experienced a groundbreaking season at Old Trafford under David Moyes but has struggled to make an impact on the first team ever since.
Mourinho, after finally securing the signature of Paul Pogba, now has his desired squad of 26 players, which has no place for the 21-year-old.
After being stripped of the No.11 shirt and forced to train with the reserves, Januzaj is now fixated leaving Man United for good, with David Moyes – now manager of Sunderland – reportedly interested in bringing the winger to the Stadium of Light.
Januzaj’s desire to part ways with United is understandable. Ever since announcing himself during an otherwise tumultuous 2013/14 campaign, the youngster has encountered a steady regression into anonymity at Old Trafford.
He displayed glimpses of promise in the early stages of last season, only to be sent out on what proved to be an unfruitful loan spell at Borussia Dortmund. And despite being called back in February, Januzaj only managed 17 minutes altogether under the Dutchman.
With Mourinho, hellbent on instant success, clearly uninterested in giving Januzaj a chance, it makes sense for the youngster to move on. United fans will be partly sad to see him go; that blistering, slippery presence on the wing he displayed under Moyes was scintillating, but two years of mediocrity and shakiness is simply not good enough at this level.