Paolo Di Canio
This is another slide that may seem overly harsh, but Paolo Canio is a volcanic liability at Sunderland, capable of erupting at any moment.
Motivational coaches with disciplinarian ways can often prosper in the lower leagues, but highly paid Premier League stars will be far less inclined to accept his controversial methods. He's already shown he struggles during tougher times of management, regularly belittling and criticising players in public.
His excessive passion and intense match-day demeanour surely cause more harm than good and, having already endured a disappointing start, surely it's time he tried a less regimented approach?
If he remains as volatile, this marriage won't last.