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Andy Robertson walks off after being shown a red card during the Premier League match between Liverpool and Fulham.(Image: Liverpool FC/Liverpool FC via Getty Images)

Former Premier League referee Dermot Gallagher believes it was the correct decision to show Issa Diop a yellow card for his challenge on Andy Robertson during Liverpool's 2-2 draw with Fulham on Saturday.

The high-studded challenge by the Frenchman left Reds defender Robertson in a heap on the Anfield turf and in need of treatment.

To the disbelief of many, Diop was only shown a yellow card by referee Tony Harrington, with the Video Assistant Referee agreeing with the decision after a brief check.

However, Gallagher believes Harrington's decision to only caution Diop was the right call as he described the challenge as a "high tariff yellow card".

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Speaking on Sky Sports' Ref Watch, Gallagher said: "I think it’s a yellow card.

It’s what I call a high tariff yellow card.

I think it’s a yellow card the referee would say to the player, ‘Listen, that’s as far as you can go, any foul of any consequence after this, you’re going to be sent off.”

The Premier League's Match Centre account issued a statement on X - formerly Twitter - instantly after the incident It read: "The referee issued a yellow card to Diop for a challenge on Robertson.

VAR checked for a potential red card and confirmed the referee’s call of reckless challenge and yellow card.".

Ironically, it was Robertson who was given his marching orders by Harrington 15 minutes later for denying Harry Wilson a goal-scoring opportunity after he failed to judge the flight of the ball.

And Reds head coach Arne Slot believes the Scot's mistake that led to his red card was influenced by the injury he suffered at the hands of Diop moments before.

“I think Robbo might have been a bit too injured to keep going because normally, he’s faster than that," said Slot.