UFC Fight Night Brazil: Charles Oliveira vs. Mateusz Gamrot headlines after Rafael Fiziev injury

UFC Fight Night Brazil: Charles Oliveira vs. Mateusz Gamrot Headline Fight Highlights: - The main event for UFC Fight Night Brazil has changed due to an injury to Rafael Fiziev. - Charles Oliveira, the former UFC lightweight champion, will now face Mateusz Gamrot in the headlining bout. - Oliveira was originally scheduled to face Fiziev, but the latter had to withdraw due to an undisclosed injury. - Gamrot, a rising contender in the lightweight division, steps in as a replacement on short notice. - The fight will take place on August 12th in Rio de Janeiro, Brazil, Oliveira's home country. - Both fighters are ranked in the top 10 of the UFC lightweight division and the matchup promises an exciting main event. - Oliveira will look to bounce back after losing the lightweight title, while Gamrot seeks to continue his impressive run in the UFC.
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