Watford fullback Nordin Amrabat was furious after Morocco's 2-2 draw with Spain for their final World Cup group game.
Spain were able to equalise late on against Morocco thanks to VAR, which ruled that Iago Aspas' stoppage-time goal was legal.
"Bulls**t," was the word shouted at a camera by Amrabat, who was on-loan at Leganes last season, after the match, with the player even making the VAR sign as he did so.
For captain Mbark Boussoufa, his upset stemmed from the fact that VAR wasn't used consistently for all of the game's controversial incidents.
"What is there to say about the referee's performance?" he started.
"I think he has made really bad decisions and has cost us.
"When [Gerard] Pique handled the ball there was no use of VAR, although it's obvious what happened.
"Everyone could see what happened.
"It's good to use VAR, but they didn't do so when Pique used his hand.
"These situations are complicated, but it's in the past, as they've made the decisions in this way and we have to leave it."