Beibut Shumenov has filed a lawsuit in Nevada seeking to confirm the termination of his contract with Goossen Tutor Promotions, according to a press release.
The light heavyweight titleholder from Kazakhstan announced in January that he had severed ties with the Los Angeles-based promotional firm.
The fighter alleges that Goossen Tutor violated provisions in the contract in several ways. The lawsuit alleges breach of contract, breach of fiduciary duty, fraud and deceptive trade practices.
Shumenov also seeks unspecified damages, including punitive damages.
The Las Vegas resident is now promoted by the company he and his brother Chingis owns, KZ Event Productions.
Shumenov (11-1, 7 knockouts) won the WBA 175-pound belt in only his 10th pro fight, outpointing titleholder Gabriel Campillo in January of last year. Campillo had outpointed Shumenov five months earlier.