The Merseyside derby is officially the Premier League's dirtiest match and that was true before Funes Mori's horror tackle that may have seriously injured Divock Origi.
Everton's centre-back became the 21st player in the Premier League era to receive a red card in the fixture and few could argue that it was one of the most deserving.
Lunging clumsily towards the Belgian striker, who had already scored on the night, Mori's leg landed straight on Origi's ankle, leaving him writhing in agony and the referee in no doubt.
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A red card was quickly produced and a stretcher soon took Origi away, but not after some lengthy treatment from the Liverpool physios.
Daniel Sturridge replaced him and went on to score, but the Anfield crowd were clearly concerned for the welfare of their young starlet.
Jurgen Klopp's reaction summed it up perfectly. When most managers would get angry at the sight of such an outrageous tackle, the German's face was filled with anxiety.
Here is the tackle
Here is what he looked like:
Credit: Sky Sports
And here is the reaction on Twitter:
Best form of his career
Origi, 20, had been in the best form of his career ahead of the Merseyside derby, scoring four goals in his last four starts. His strike in the first half against the Toffees only took his meteoric rise further into the stratosphere and Liverpool fans will be hoping to see him back in action this season.