Conor McGregor, the undeniable force | Tony talks to "The Notorious" about his unwavering certainty, ruthless mindset and how he became the king of combat sports

Conor McGregor will go down in history as one of the greatest mixed martial arts fighters of all time. In this interview with Tony Robbins, he shares the bulletproof mindset that took him from being a plumber's apprentice in Dublin to worldwide fame as the most "Notorious" fighter on the planet and the biggest name in the UFC. You'll also get an inside look at two of the most anticipated fights in combat sports: Conor's landmark boxing match with 11-time world champion Floyd Mayweather Junior – and his lightweight MMA title fight against Khabib Nurmagomedov. Conor also explains how he's driven his new whiskey company, Proper 12, to become an overnight success, and he opens up about his passion for helping others and the philanthropic projects he supports.