Nate Diaz says he lost $9 million in Masvidal fight, Fanmio sues

Nate Diaz says he was promised $10 million for his fight with Jorge Masvidal …but he claims he never got 90% of the money — and now he’s suing to get money he says he rightly deserves!

The former UFC star’s attorney, Jeremiah Reynolds, filed the lawsuit Monday in U.S. District Court in Miami … less than two weeks after he and Masvidal faced off in a boxing match at the Honda Center in Anaheim.

Diaz claims in the lawsuit, obtained by TMZ Sportsthat before he ever stepped in the ring with Game Bred… he made a deal with promoter Solomon Angel and his company, Fanmio, in which he agreed to take the fight in exchange for a $9 million payday.

But Diaz says after he defeated Masvidal on July 6 in a 10-round match… Engel refused to pay. According to Diaz, Engel said he could not provide the money because he was not benefiting from the fight as he expected.

The lawsuit also alleges that Engel told Diaz that despite verbal and written agreements, he could not pay him because his wife might divorce him due to the financial loss.

Diaz is suing for fraud and breach of contract. The documents state that he would never have gotten in the ring with Masvidal if he knew he wasn’t getting paid.