Liverpool fans have hit out at BT Sport pundit Howard Webb following his verdict on Roberto Firmino's penalty appeal.
The Reds midfielder, who has enjoyed a fine first-half in Switzerland, appeared to hit the ball against the Sevilla defender.
However, the match official waved away the appeal to the frustration of Liverpool supporters.
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As you can see in the video below, the ball definitely hit the hand of the Sevilla man, but it's not entirely certain as to whether it was intentional.
Webb, who previously managed in the Premier League, took to BT Sport during the game to claim that the referee had made the correct decision.
Here was the moment Liverpool were denied a penalty:
And here's how fans reacted to Webb's verdict:
Liverpool in front
Despite the club's failed penalty appeal, they are in front by one goal to nil at half-time at St. Jakob-Park.
It was England international who struck the opener for the Reds with a brilliant strike. Indeed, he hit the ball accurately with the outside of his foot to send Liverpool fans wild in Switzerland.
There's a long way to go, of course, but the Reds will believe that they are well on course to securing their first trophy in four years.
Do you think it was a penalty? Have your say in the comments section below!