Japan's Ryota Murata will not make a mandatory defense of his WBA middleweight title as the 2012 London Olympic champ has bigger fish to fry, his gym chairman said Tuesday.

Earlier, the WBA had announced that Murata's Teiken Gym and promoter Top Rank had rejected a 50-50 split of the purse against second-ranked challenger Rob Brant. Regardless of the reasons, Murata's side stressed that a fight against Brant is not part of the Japanese Olympic champ's big picture.

According to American sports site espn.com, the 50-50 split of the purse for the Brant fight had been mandated by the WBA as a condition of Murata's championship rematch with Frenchman Hassan N'Dam -- when Murata won the title last October. The champion's typical share of the purse is 70 percent.

But Akihiko Honda, the chairman of Teiken Gym, said, "What they are saying now and what we accepted before are different."

Honda indicated, however, that Murata will fight on Oct. 20 in Las Vegas as a prelude to his eventual goal, the super middleweight crown. The current WBA super middleweight champion, Gennady Golovkin of Kazakhstan, will fight Mexico's Saul Alvarez on Sept. 15 in Las Vegas, when the IBO's and WBC's middleweight title will be on the line.

Murata's focus is now on facing the winner of the Golovkin-Alvarez fight, although holding out for that and failing to fight Brant will likely cost Murata his current title.

"Our priority is on our target, not on piling up title defenses," Honda said.

==Kyodo