Neymar's acrimonious split from Barcelona escalated on Thursday as the Paris St Germain forward announced plans to sue the La Liga club.
Two days after FC Barcelona revealed they were suing former player Neymar Jr over breach of contract, the Brazilian had filed a lawsuit via soccer's world governing body against his former club.
Reports in the Spanish media said that Neymar had filed a lawsuit via soccer's world governing body against the La Liga club for an unpaid loyalty bonus of 26 million euros ($30.69 million), which was included in the last contract the player signed with the Catalan side in November 2016.
FIFA confirmed that they had "received a claim from Neymar against FC Barcelona" and said the matter was being investigated.
PSG smashed the world transfer record earlier this month by triggering the 222 million euro buyout clause in the contract.
On Tuesday, Barcelona said they were suing Neymar for 8.5 million euros as they want him to return the bonus he was paid when he signed the five-year deal.
The bonus Barca referred to is separate to the 26 million euro payment, according to reports in Spain.
Neymar's management group N & N Consultoria responded in a statement on Tuesday that the player had fulfilled the terms of the contract, as well as stating it was planning legal action.
The player's lawsuit against Barca is the latest chapter of an increasingly bitter split between Neymar and the club.
The Brazilian launched a tirade against Barcelona's board and president Josep Maria Bartomeu after starring on his home debut for PSG last Sunday in a 6-2 win over Toulouse.
He said: "I am disappointed with them (Barcelona directors). I spent four very happy years there and left happy, but not with them. For me they shouldn't be in charge of Barcelona. Barca deserve much better and everyone knows this."
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