UK 
United States
The introduction of caretaker boss Ole Gunnar Solskjaer has had a miraculous impact on Manchester United after just three months in the job – and it makes for a fascinating case study.
Love them or loathe them, it’s easy to recall how bleak things were looking for Manchester United back in mid-December. The team looked despondent under then-manager Jose Mourinho, floundering around seventh in the league and finding themselves 11 points adrift of qualification for the Champions League – a minimum expectation from both the board and the fans.
Lessons from the UK's best (and worst) bosses
It was an organisation in disarray, and the air around the dressing room was nothing short of toxic. Key players were regularly named and blamed by Mourinho during post-match interviews. Contracts went unsigned, with many hot prospects seemingly looking to seek a quick transfer elsewhere in January.
Sheer lack of confidence played out in lacklustre performances on the pitch, summed up in a 3-1 defeat to arch-rivals Liverpool.
