Paulo Costa responds to Bogdan Guskov's callout

Paulo Costa has responded to a callout from Bogdan Guskov. The post provides no additional details about the nature of Costa's response or what was said. This is simply a brief acknowledgment that Costa has publicly reacted to Guskov's challenge. Further details about the exchange are not available in the post. The context suggests ongoing tension or interest in a potential matchup between the two middleweights.