Olympic gold medalist Oleksandr Usyk will harness the star power of his rematch with Anthony Joshua to raise relief funds for his native Ukraine, the unified heavyweight champion said.

Usyk and Joshua are expected to fight later this year, though a date and location have not been determined.

Usyk joined Kyiv's territorial defense battalion after Russia began its invasion in February but received permission weeks later to leave the country and prepare for a rematch against Joshua. He did not disclose his next location.