Howard Webb's decision not to give a penalty to Liverpool for Alex Oxlade-Chamberlain's foul on Luis Suarez in the second half of Arsenal 2-1 Liverpool on Sunday wasn't the first time he's angered Reds fans.
England's refereeing representative at this year's World Cup in Brazil, and referee of the last World Cup final in 2010, Webb's poor decisions against Liverpool are becoming something of a nasty habit.
His appalling performances even brought about an FA charge for former Liverpool winger Ryan Babel in January 2011, when the Dutch winger posted a mocked-up picture of Webb in a Manchester United shirt on his Twitter account.
The latest incident, denying Liverpool a second penalty of the game in the FA Cup fifth-round defeat at the Emirates brought about reactions of "disgrace" from Liverpool fans on Twitter.
It prompted an angry but collected response from Brendan Rodgers too, as per the North Wales Daily Post:
We’re bitterly disappointed not to get another penalty. It was probably more clear and blatant than the first one.
The second one is clear. I’m not sure if it was just after (the first one being awarded), but it was a clear penalty. Luis got a touch on the ball and young Alex has taken him out.
It was a strange decision. It was a penalty... and it was a clear one.
On fair reflection, Steven Gerrard probably should have been sent off later for his second bookable offence when he brought down Oxlade-Chamberlain, but a coy Webb kept his cards in his pocket.
Webb's atrocious decisions have cost Liverpool dear in recent years and here are five other decisions of his that haven't gone Liverpool's way when really they should have.
Which was the worst? Leave your opinion in the comments section below.