 This was reiterated some months later, following Márquez's victory over Juan Díaz in a rematch of their 2009 fight.Katsidis was in attendance for the aforementioned event in order to scout out the winner and primarily to assert his claim to be next in line against Márquez.On 25 August the CEO of Golden Boy Promotions, Richard Schaefer, announced that Márquez had decided to stay at lightweight and defend his unified WBA, WBO, "Ring", and lineal titles against Katsidis on 27 November at the MGM Grand.