15:50Snooker: World Championship2009Day 11 Part 1BBC Two Duration: 2 hours, 5 minutes Tue 28th Apr 2009, 15:50 on BBC Two Northern Ireland (Analogue)It's the quarter-finals at the Crucible as the tournament enters its eleventh day. Ray Stubbs, Steve Davis and John Parrott introduce action from the best-of-25 frame matches.ContributorsPresenter:Ray StubbsPresenter:Steve DavisPresenter:John ParrottCommentator:Dennis TaylorCommentator:Willie ThorneCommentator:John VirgoCommentator:Terry GriffithsCommentator:Neal FouldsGenresSportSnookerBrandSnooker: World ChampionshipSeriesSnooker: World Championship: 2009 Source: BBC Online