The Brazilian moved to Eastlands at the beginning of last season in a deal worth £9.5million for the Ukraine champions.

Donetsk believe City still need a pay a "solidarity payment", which usually equates to five per cent of the total sum of the deal.

The payment is distributed between clubs that played a part in the youth development of the player, however, City reportedly think the selling club are responsible for the payment.

FIFA have now confirmed they have received a complaint from Donetsk and that they will unveil their findings in due course.

"We can confirm Donetsk have lodged a claim with Fifa regarding this matter," said a FIFA spokesman.

"As the relevant procedure will start in due course, we can't provide further comments for the time being."