By Steve Kim

Sergey Kovalev (30-0, 26KOs) defends his light heavyweight titles this weekend at the T-Mobile Arena in Las Vegas against Olympic gold medal winner Andre Ward (30-0, 15KOs).

And according to Kathy Duva (who's company, Main Events, handles the career of Kovalev) there is a rematch clause in place.

"Of course, when the fight was made it was not a mandatory so we have the rights to a rematch if Sergey is not successful and Ward could also ask for a rematch also but it's a little complicated, the clause," said Duva.

Coming into the fight Kovalev is the owner of the WBA, WBO and IBF belts. The fight will be carried by HBO pay-per-view.

"There's no doubt that we wouldn't be doing our jobs if we didn't protect Sergey's titles. It's one of the reasons I worked so hard to get the WBA, WBO and IBF to make this their mandatory so we don't have a mandatory problem coming out of it, so we can make a rematch," she explained to Boxingscene.com

"If Sergey were to lose you'd absolutely see a rematch," Duva added. "If Sergey wins it's not quite as certain."

Steve Kim is the news editor for BoxingScene.com.