Live coverage of the evening session on day 15 at the Crucible Theatre in Sheffield, featuring the fourth and final session of the second semi-final. Mark Williams claimed a hard-fought 17-14 victory over Judd Trump at this stage last year. He finished the match with a break of 123 and becoming the oldest player to reach the final of this event at the age of 50. With commentary and analysis from Steve Davis, Ken Doherty, Steven Hallworth, Stephen Hendry, John Parrott, Joe Perry, Dennis Taylor and Lee Walker