Ronnie O'Sullivan

With five World Championship titles already under his belt, Ronnie 'The Rocket' O'Sullivan will compete in Sheffield this weekend hoping to secure a sixth. He is seen by many as the greatest snooker player in history. O'Sullivan arrived on the professional snooker scene when he was just a teenager, and immediately caused a storm. His talent was never in doubt. When on form, he is unbeatable. But his public battles with alcoholism, drugs and depression have plagued him throughout his career. Which Ronnie will be on display at the Crucible over the next few weeks? Presenter: Mark Coles Producers: Hannah Barnes and Ben Crighton.