Paulo Costa responds to Bogdan Guskov's callout

Paulo Costa has responded to a callout from Bogdan Guskov on social media. The Brazilian middleweight acknowledged the challenge from Guskov, though the specific nature of Costa's response was not detailed in the post. This represents a potential matchup between the two middleweights, with Guskov seeking to secure a fight against the former title challenger. No official confirmation of a booking or timeframe for the potential bout was provided. The exchange appears to be part of ongoing social media negotiations between fighters seeking to arrange matchups.