And we saw what happened when their "average midfield" got dominated against PSG and Messi suffered less time on the ball:
LIONEL MESSI suffered undoubtedly one of the biggest no-show performances of his career last night as Barcelona were obliterated by Paris Saint-Germain.
The five-time Ballon d'Or winner could be seen jogging around the pitch after losing the ball last night as he gave the ball away and simply failed to connect with his team-mates.
OptaJoe
1 - Lionel Messi has failed to register a single touch in the opposite box in a #UCL game for the first time this season. Disconnection.
11:47 PM - Feb 14, 2017
Messi was far from the only Barcelona player to have an absolute stinker at the Parc des Princes - but given the heights he has scaled in the Champions League, he was undoubtedly the biggest underperformer.
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It could not have been a starker contrast to the match played by Angel di Maria - as the former Real Madrid and Manchester United forward terrorised the Barcelona defence.
His Argentina team-mate surged forward with electric speed and sucked in ball-watching Barca defenders as he netted a free-kick and later another curling beauty.
But as for Messi, 29, the fact that he failed to register a single touch in the opposition's penalty area said everything you needed to know about the quality of his game.
As Opta stats have shown, if that is the case, it usually means that the Barcelona metronome is not ticking as it usually should be.
Messi played 37 passes in the game and only 28 of them were successful. He twice gave the ball away in the centre circle, an uncommon sight for the Argentinian superstar.
Meanwhile it was Andres Iniesta that got hauled off my Luis Enrique, with Barca already four goals down.
Of all the incredible things the Spaniard has achieved in his career, that must have surely been an all-time low moment.