Neymar was forced to watch from the sidelines as Paris Saint-Germain were knocked out of the Champions League on Wednesday.
The Brazilian, out since January with a foot injury, was helpless as PSG were beaten 3-1 by Manchester United, exiting the competition on away goals.
The game was decided by Marcus Rashford’s controversial penalty, which was awarded after Presnel Kimpembe was penalised for a handball.
After consulting the VAR, referee Damir Skomina pointed to the spot and Rashford stepped up to smash the ball past Gianluigi Buffon in the 94th minute.
Neymar’s perplexed face after the goal was a real sight and he couldn’t help but express his anger on Instagram at full-time.
“That is a disgrace!” he wrote, alongside a screenshot of the handball.
“And UEFA still pick four guys who know nothing about football to review the VAR decision in slow motion... that handball simply doesn't exist!
"How do you handball behind your back? Ahh.. go f*ck yourselves."
Neymar could receive three-match ban
Neymar’s reaction will probably land him in trouble and AS believe a three-match ban could be on its way.
They say his message likely contravenes article 11 of UEFA’s disciplinary code, which prohibits conduct that is 'insulting or otherwise violates the basic rules of decent conduct.'
French outlet RMC Sport - per the Independent - claimed the 27-year-old had to be restrained by PSG officials as he attempted to access the match officials' room at full-time.
PSG boss Thomas Tuchel admitted Neymar’s reaction was ‘strong’ but pleaded for leniency.
“It's... a strong reaction. Sometimes after such a fight you say things you take back later,” he said, per Miguel Delaney.
“You can see how emotional he is, and how much it meant to him. Don't be too harsh on him. Hard to accept."
Liverpool defender Dejan Lovren was punished by UEFA in January after he bragged about elbowing Sergio Ramos and making insulting remarks about the Spanish national side.
The Croatian was given a one-match international ban.