Super middleweight Badou Jack was suppose to make his first defense of his world title against mandatory challenger George Groves on Aug. 22 in Las Vegas. Then George Groves suffered a minor head injury while training, however the fight was still a go. Word came a few weeks ago that the fight was going to be moved to September 12th @ MGM Grand, the same date and place as the RUMORED Mayweather vs Berto event.
Today on Twitter WBC president Mauricio Sulaiman announced "It's official ! @BadouJack vs @StGeorgeGroves is on for September 12 @WBCBoxing super middleweight championship"
There is still no official announcement from camp Mayweather for September 12th. So we assume that Badou Jack vs George Groves will be the co-feature.