World Professional
Snooker Championship from the Crucible Theatre, Sheffield.
Day 12: Quarter-finals.
The four pretenders to the 1990 World title will be known by the end of this evening as the last two semi-final places are filled. Just two matches will separate any of the four from the World title - but potentially there are 67 frames to go, and five days on the table. Mental muscles are needed now!
News of how the last two quarter-finals are progressing comes from David Vine.