Cristiano Ronaldo may be the official best player in the world, but Lionel Messi has been on fire this season with 41 goals in 40 games for Barcelona and scoring four times in six World Cup qualifiers for his country.
In their first match since November, Argentina picked up a much-needed 1-0 win over Chile thanks to a controversially awarded 16th-minute penalty which Messi converted.
That result leaves the Argentinians third in the South American 2018 World Cup qualifying group (eight points behind leaders Brazil), however the match will be remembered for Messi's foul-mouthed outburst.
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What did Messi say?
The 29-year-old was incensed throughout the entire second half of the clash against Chile due to a series of decisions made by Marcelo van Gasse.
Messi verbally abused the linesman, and while it was not included in the officials' original report, an amended version sent to CONMEBOL on Monday has revealed what the five-time Ballon d'Or winner said in his enraged rant.
The Argentina captain refused to shake hands with Van Gaase at the end of the game, but prior to that, he screamed at the Brazilian official, via Goal: "F*** off, your mother's c***".
Given that the incident has now been reported to CONMEBOL (the governing body of South American football), Messi could be suspended for Argentina's next World Cup qualifying match.
What will happen to Messi next?
CONMEBOL's disciplinary commitee will now meet and have to decide a number of things, from the severity of Messi's punishment (if any) to when any such ban should come into effect.
If they decide to immediately suspend Messi, then he will miss his team's vital qualifying match away to Bolivia which takes place today.
That said, were the Argentinian FA to launch a prospective appeal at such a ruling, he may still potentially be able to take to the field in La Paz.
Another option for CONMEBOL is to enforce a suspension after the current international break, meaning Messi would be free to play tonight but would miss August's massive visit to Uruguay.
Of course, the committee could completely ignore and disregard the officials' amendment to the Argentina 1-0 Chile match report, and allow Messi's outburst to escape without punishment.
What do YOU make of Messi's foul-mouthed rant? Does he deserve to be suspended? Have YOUR say in the comments box below!