What was each Barcelona player doing for Liverpool's fourth goal? Barcelona Who should have been marking Divock Origi?

Barcelona were a shambles at Anfield on Tuesday evening, starting with Jordi Alba's awful defensive header in the build-up to Liverpool's first goal, right through to their staggeringly unfocused approach to Trent Alexander-Arnold's clever corner kick, but just what was each Blaugrana player doing for Divock Origi's winning goal?

Lionel Messi is being forced to look back on yet another season where his stupendous natural talented hasn't been rewarded with a fifth Champions League trophy, and it's easy to see why his patience is waning.

Ernesto Valverde has built up a lot of credit for his domestic success at the Camp Nou, but has never quite managed to shake the tag of being overly cautious, which manifested itself once more on Tuesday evening.

His team selection and tactical approach can be debated for the entirety of Wednesday afternoon, but just why were his team asleep at the wheel for Liverpool's fourth goal?

Jurgen Klopp's charges were phenomenal, they pressed their opponents from minute one, and it's likely that this took a toll on the Catalan giants, defending a corner seemed like an excuse for them to take a breather.

Arturo Vidal was the designated man-marker of Origi until the Chilean was substituted, and there was a leadership vacuum which saw the Belgian run free after that.

Alba was monitoring the short corner when he saw Xherdan Shaqiri trot over to Alexander-Arnold.

Gerard Pique is always reliable in the pocket of space just in front of Marc-Andre ter Stegen, although this was where the ball actually ended up.

Clement Lenglet was on the penalty spot, making sure Virgil van Dijk, Liverpool's main threat from corners, wasn't able to make a late run.

Sergio Busquets was also on the penalty spot, awaiting a move from Joel Matip.

Ivan Rakitic was marking Fabinho near the penalty spot.

Sergi Roberto was the player caught cold by the well taken set-piece, he turned his back and was retreating into the penalty area after giving the corner away. He was one of the possible candidates to mark Origi, although it would have taken a significant physical effort to get there.

As far as Arthur is concerned, it's obvious the Brazilian wasn't aware of his defensive role at corners once he was introduced. He hadn't yet been on the pitch for such a scenario, and wasn't marking a single Liverpool player when the ball was struck.

Luis Suarez is responsible for covering the near-post, as many forwards are in the modern game, and he was the only Barcelona player in motion when the kick was taken.

Lionel Messi doesn't have any defensive duties on corners, he is usually asked to just wait on the edge of the box in the anticipation of a possible counter attack, in this instance he wasn't even looking at the ball.