The deal, unique in its structure, raises interesting questions about revenue splits for superstar athletes and the cascading impact on media rights negotiations.
Napoli were beaten 3-0 at home by Atalanta in Serie A on Saturday as the Italian champions lost further ground in the race for Champions League qualification.
Liverpool forward Mohamed Salah has reaffirmed that this will be his last season at the Merseyside club as negotiations have stalled over a new contract.
