Light heavyweight world titleholder Dmitry Bivol (13-0, 11 KOs), 27, of Russia, who is slated to make his third defense on Aug. 4 (HBO), could face former title challenger Isaac Chilemba (25-5-2, 10 KOs), 31, a native of Malawi fighting out of South Africa. “Chilemba is one of the possible opponents for Bivol,” Vadim Kornilov, Bivol’s manager, told ESPN on Tuesday. “We will know for sure in the next couple of days.” Bivol’s fight will serve as the co-feature on the card headlined by light heavyweight world titlist Sergey Kovalev (32-2-1, 28 KOs) defending against Eleider “Storm” Alvarez (23-0, 11 KOs) at the Mark G. Etess Arena at the new Hard Rock Hotel & Casino in Atlantic City, New Jersey, which opens on June 28. Bivol impressively stopped contender Sullivan Barrera in the 12th round on March 3 on Kovalev’s previous undercard. Chilemba, who is coming off a unanimous decision win over former title challenger Blake Caparello on March 16 in Australia, lost his only previous world title bout, a decision to Kovalev in Russia in July 2016. Chilemba also lost a disputed majority decision to Alvarez in a 2015 title eliminator.