The NBPA is filing a grievance against the Sacramento Kings, challenging the legitimacy of the franchise’s voiding of free-agent forward Luc Mbah a Moute’s contract over an alleged failed medical physical, according to sources.

The NBPA is planning to file the grievance to the NBA early next week.

Mbah a Moute has been meeting with NBPA executive director Michele Roberts in Johannesburg this week, where Mbah a Moute, a Cameroon native, has been medically cleared to play for Team Africa against Team World in the first NBA exhibition game in Africa.

Mbah a Moute signed a one-year, $1.5 million deal with Sacramento on July 14.