TSG's number 10 put in a committed display in Fenerbahce's Sükrü Saraçoglu Stadium.
Carlos Dunga's team had already scored all of their goals in a 4-0 win prior to Firmino being introduced. The goalscorers for Brazil were Neymar (2) and Willian, with Turkey player Semih Kaya also scoring an own goal.
Things didn't go so well for Tarik Elyounoussi and Norway. They lost 1-0 in a friendly against Estonia in Oslo's Ulleval Stadium. The Hoffenheim attacker played for the full 90 minutes - not the ideal preparation for their EURO 2016 qualifier against Azerbaijan on Sunday.