Neymar joined Barcelona from Santos in summer 2013, and then signed for Paris Saint-Germain four years later

A Spanish magistrate leading an investigation into alleged irregularities in Neymar's move to Barcelona in 2013 says the Brazilian could face up to six years in prison.

"The term imposed, in principle, could be between four and six years," says a decree issued by judge Jose Maria Vazquez Honrubia, a copy of which was seen by AFP.

Neymar, his parents, Barcelona president Josep Maria Bartomeu and his predecessor Sandro Rosell are all awaiting trial over alleged corruption concerning Neymar's move to the Spanish giants in 2013.

The Brazil international forward subsequently moved to Paris Saint-Germain in August 2017.

The case, which follows a complaint by DIS, a Brazilian group which part-owned the rights to Neymar, surrounds allegations of "corruption" and "fraud" in the player's move to Barca.

Neymar, his parents, Barca president Josep Maria Bartomeu and his predecessor Sandro Rosell are all awaiting trial over alleged corruption concerning Neymar's move to Barca

Neymar moved to the club in May 2013 for a reported fee of 57.1m euros. Although no financial details of the deal were revealed by either Barcelona or his Brazilian club Santos, Neymar's parents were said to have received 40m euros and Santos 17.1m euros.

In January 2014, prosecutors in Madrid began investigating the transfer because documents requested by the authorities contained contradictory information.

Rosell resigned from his post as president a week later and Barcelona subsequently revealed they had actually paid 86.2m euros for the Brazilian star.

DIS, who received 6m euros of the 17.1m given to Santos, alleges that Barca and the Brazilian club colluded to mask the true cost of the deal.

Bartomeu, Rosell, Barcelona, Santos and its former president, Odilio Rodrigues Filho, are now expected to answer charges of fraud, according to the decree.

Neymar joined PSG for a world-record £200m fee from Barca in August 2017

Because the prison term involved exceeds five years, three judges are set to preside over Neymar's trial which is expected to be heard at the Audiencia Nacional, a high court with jurisdiction over Spanish territory as well as over international crimes which come under the jurisdiction of Spanish courts.

Whether Neymar faces a prison term remains to be seen, however.

In May 2017, the Spanish authorities said Neymar should stand trial but no date has yet been set.