Fans took to social media to vent their frustration at Liverpool goalkeeper Caoimhin Kelleher not receiving a red card for a reckless challenge against Cardiff.
The Reds progressed to the fifth round of the FA cup as goals from Diogo Jota, Takumi Minamino and Harvey Elliott saw them win 3-1 at Anfield.
With the scored tied at 0-0, the game could have taken a turn for the worst for Liverpool just seconds into the second-half.
The replays showed Caoimhin Kelleher's studs were high when he challenged for the ball
But the Liverpool keeper got away with just a yellow as the Cardiff players protested for a red
More VAR Drama
Caoimhin Kelleher goes into the book but should the Liverpool 'keeper have been sent off?