Captain Wayne Rooney has continued his fall from grace at Old Trafford under Mourinho after struggling under Louis van Gaal.
Summer signing Zlatan Ibrahimovic went through a dry spell after a prolific start to his first Premier League campaign, too.
From Premier League forwards to Barcelona superstars, who are the strikers being linked with a move to Manchester United ahead of the 2017 January transfer window?
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Antoine Griezmann would be an excellent signing for Manchester United.
The Atletico Madrid forward has made no secret of his desire to play club football with Red Devils star Paul Pogba.
Next up is a Premier League striker.