World Snooker: Ronnie O'Sullivan beats Matthew Stevens

Five-time winner Ronnie O'Sullivan says he "doesn't get excited" like he used to at the Snooker World Championship.

The 39-year-old, who beat Matthew Stevens 13-5 to reach the quarter-finals, says you "lose motivation" after the success he has had and that he feels no pressure to add to his list of wins.

O'Sullivan says he expects quarter-final opponent Stuart Bingham to be more driven than him when they meet.