Ronnie O'Sullivan has confessed the cut-throat nature of professional snooker at the top level comes with the merciless mindset of «ruining your opponent's life». In a no-holds barred account more akin to boxing, the seven-time world champion has laid bare the bloodthirsty aspect of the green baize by acknowledging the key to success comes down to «f****** them up». Ad Despite battling with his mental health throughout his tumultuous and turbulent 31-year career, O'Sullivan has become a master of such mind games as the undisputed snooker GOAT by winning a record 39 ranking titles, including seven world titles and seven Masters crowns since 1995.