Paulo Costa responds to Bogdan Guskov's callout

Paulo Costa has responded to a callout from Bogdan Guskov on social media. The post was extremely brief and did not include any details about the nature of Costa's response, whether he accepted or declined a potential fight, or what he specifically said. The interaction suggests there is some interest in a potential matchup between the two middleweights. Given the limited information provided, the specifics of their exchange remain unclear. Further context would be needed to understand Costa's intentions or stance.