13:00Snooker: World Championship2019Day 11 Quarter-Finals, Afternoon SessionBBC Two Duration: 4 hours, 59 minutes Tue 30th Apr 2019, 13:00 on BBC Two Northern Ireland HDHazel Irvine introduces quarter-final action, where the first two matches got underway this morning. Matches are the best of 25 frames, played over three sessions.ContributorsPresenter:Hazel IrvineCommentator:Steve DavisCommentator:Ken DohertyCommentator:Shaun MurphyCommentator:Stephen HendryCommentator:Alan McManusCommentator:John ParrottCommentator:Dennis TaylorCommentator:John VirgoGenresSportSportSnookerBrandSnooker: World ChampionshipSeriesSnooker: World Championship: 2019 Source: BBC Online