“Former UK champion John Virgo believes Ronnie Ou0027Sullivanu0027s 10-5 defeat to Mark Williams in the Tour Championship final should act as a warning ahead of the world No. 1u0027s quest for a record eighth Crucible crown. Ou0027Sullivan lost the final seven frames to Williams with Luca Brecel managing a similar feat in a 13-10 quarter-final win in Sheffield a year ago. “It was hard to believe,” said Virgo.”