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Cesar Gracie is a Brazilian jiu-jitsu practitioner and instructor who has been teaching the martial art for over 30 years. He is a black belt under Carlos Gracie Jr. and has trained many notable fighters, including Nate Diaz, Nick Diaz, Gilbert Melendez, and Josh Thomson. Gracie is known for his aggressive style of Brazilian jiu-jitsu, which emphasizes takedowns and submission holds.