Yamal caught demanding clearer instructions from Barcelona coach Flick

Barca won 4-2 on the night, with Yamal on the scoresheet, while Robert Lewandowski hit a hat-trick.

But midway through the first-half, Yamal suggested there was confusion within the Blaugrana ranks - particularly with how Flick had setup his midfield.

At one point during the game, Yamal, caught on camera by Movistar Plus, was asking how the team could stop struggling in this regard.

"What do we do in the middle of the field? What do we do in the middle of the field?" the youth player repeatedly was seen shouting.