Starring role for Zak
Zak Truscott won two of his four frames as the county side were beaten by Sussex in Brighton.
Back on the 12ft tables, the 13-year-old lost all three matches in the week-16 action.
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Hide AdDean Russell strengthened his case for the runner-up spot behind champion-elect Samuel Laxton by winning the top group.
He has a one-point advantage over Harry Wilson with four weeks left.
Owen Jenkins climbed to 12th after topping the second group.
World Snooker coach Tim Dunkley runs sessions for under-19s from 4.30pm to 6.30pm every Wednesday. The league runs throughout the summer.
Week 16 group winners: Dean Russell, Owen Jenkins.
Breaks: Harry Wilson 18, Dean Russell 16.