Mourinho was sacked on Tuesday, two days after a dire display in a 3-1 defeat to bitter rivals Liverpool, leaving the Reds 19 points ahead of United in the Premier League table.
A common theme of Mourinho's time at Old Trafford was his incessant demands for greater backingĀ in the transfer market, despite spending a small fortune.
Sections of the media suggested United grew frustrated with Mourinho not getting the best out of players he identified, which meant alternative options were sought after.