As the controversy surrounding Robin van Persie's sending off rumbles on following Arsenal's acrimonious Champions League departure, calls for improvements in refereeing standards continue.
Whilst the subject of video technology will always be a permanent fixture in football talk, many are now clamouring for FIFA to focus on the man in the middle more so than anything else.
Massimo Busacca's decision to send off Van Persie has generally been regarded as one of the worst refereeing decisions of all time, despite the fact he did indeed stick to the laws of the game.
But how bad is his decision in comparison to others in the annals of football's officialdom calamity?
Here are the 25 worst refereeing decisions of all time.