Paulo Costa responds to Bogdan Guskov's callout

Brazilian middleweight Paulo Costa has responded to a challenge from Bogdan Guskov. The details of Costa's response are limited in the source material, which only notes that the Brazilian fighter reacted to Guskov's callout on social media. Guskov, a rising middleweight, had previously declined a fight with another opponent before issuing his challenge to Costa. The exchange represents the ongoing social media callout culture in MMA where fighters seek high-profile matchups. Whether this leads to an actual booking remains to be seen as no official fight announcement has been made.