In the most dramatic Premier League relegation battle for many years, there is huge pressure on the officials to get the big decisions right. The weeks ahead will reveal whether they are up to the task.
If a refereeing error costs Arsenal or Manchester City the title, everyone will remember it — but it will make little difference to either club's financial position or the livelihoods of their staff.
That is not the case in the relegation battle, where dropping into the Championship means missing out on hundreds of millions of pounds in television revenue.