Paulo Costa responds to callout from Bogdan Guskov

Brazilian middleweight Paulo Costa has publicly responded to a callout from Bogdan Guskov. The post indicates that Guskov challenged Costa to a fight, and Costa has acknowledged the challenge through social media. Details of Costa's specific response or whether he accepted the fight are not provided in the original post. This represents the latest development in what appears to be a brewing rivalry between the two middleweights. Further information about potential matchmaking or official negotiations has not been disclosed.