Messi has got his sentence for Tax-Fraud and the sentence is no less than a fine and 21 months in prison. BUT. Because it's Lionel Messi's first crime, he will not have to spend time in jail, not yet.
Messi has been sentenced with 21 months in jail, but the sentence is suspended which means, that he will only have to spend time in jail if he commits another crime. So Real Madrid fans can stop crossing their fingers, Lionel Messi will still play for FC Barcelona next year in the La Liga and not in the Prison League.
Messi has got his sentence because of Tax-fraud, which his father has comitted. Messi told the judge that he had no knowledge about the fraud, but they just didn't believe him and that's why they both got sentenced.
Messi has been defrauding the government of €4.2 million between 2007 and 2009, by sending his money to offshore companies in Belize.
Next to the prison sentence, Messi got a fine of €1.5 million, and he already paid the tax + interest back. The money won't be a problem for the Argentinian though, because he has an estimated income worth of $350 million during the period.