Barcelona had to overcome the sending off of Clement Lenglet as they beat Celta Vigo 3-0 on Thursday night.
The French defender saw red shortly before half-time as he was shown a second yellow card for putting an arm across Denis Suarez.
It left Barcelona in a tough spot after Ansu Fati had given them an early lead to continue his fine start to the season.
And Lionel Messi led a group of players who took exception to the decision and addressed it with referee Del Cerro Grande.
After protests on the pitch, the tunnel footage shared by Movistar showed Messi, Gerard Pique and manager Ronald Koeman all confronting the referee at half-time.
Del Cerro Grande was seen explains his decision in the discussion and why Lenglet was sent off, reproducing the move the defender made with his arm.
The fired-up Catalan club came out strongly after the break and ran out 3-0 winners to make it two wins from two in LaLiga.
After the game, Koeman expressed his pride at the way his side performed after the “tough” decision to dismiss Lenglet.
"You can debate whether it was a yellow or not," the Barca boss said. "It was a tough punishment. It's difficult being a referee. It's a decision we don't have to discuss.
"It was more important to talk about how to play with a man down than to discuss that.
"I'm very proud of this team in today's match. We worked very well and played with a lot of discipline in the team, with one man down.
"We're doing a job good. These results invite us to think that we're on the right track."
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