Napoli are threatening to block Victor Osimhen's call to Nigeria's Africa Cup of Nations squad.

Napoli's legal chief has warned the NFF regarding Osimhen testing for covid.

“With an agreement between Napoli and the Nigerian Federation, Osimhen could've played against Juventus on January 6 and then left immediately after the game," club lawyer Enrico Lubrano told Radio Punto Nuovo.

“However, covid complicates everything. The club can say the player is unavailable, but the situation must be verified by the Federation medic. What the FIFA rules do not state is the place where the medical verification is made.

“The FIFA rules note that if a player does not go on international duty because of injury, he cannot be used by his club during the same period that he would've played for his country, even if he recovers earlier."

Lubrano was asked if there could potentially be a legal battle should Napoli ask for Osimhen to be examined by doctor Tartaro and Nigeria refuse to let him leave?

“It is a realistic scenario. Medicine is not an exact science, one doctor can say one thing and another medic give a different opinion.

“FIFA give the final word to the Nigerian Federation. We won't rule out taking legal action against the Nigerian Federation, seeking compensation."