There are two Irishmen in action in the Quarter-finals of the World Championship at the Crucible in Sheffield today. Dubliner Fergal O’Brien takes on World No.1 Mark Williams, but its not good news for the O'Brien as his opponent only needs one more frame to book a semi-final berth. While on the other table Northern Ireland’s Joe Swail takes on Welshman Dominic Dale. The matches are decided over the best of 25 frames. Latest scores; Dale 6 Swail 9 and Williams 12 O'Brien 4 - while its Mark Stevens 5 Jimmy White 3 and John Higgins 5 Anthony Hamilton 3 - those last two matches resume tomorrow.