Singaporean’s fine run comes to an end
Leader, Gye Min-Young of Korea continued to lead the field and stretching her lead over England's Fiona Banks to 278 pins while Aumi Guerra of Dominican Republic was third.
Tan then lost the next two games and although she ended with a win in her final game, all she could score was a 32-game aggregate total of 6756 which put her in sixth position and the Korean advancing into the stepladder finals as top seed with 7150.
Meanwhile Matt Miller of England finish as top seed in the men's division with 7173 follwed by 2005 champion, Michael Schmidt of Canada in second and 2006 World Championship Masters gold medalist, Biboy Rivera of the Philippines third.
The top 3 women and top 3 men will contest the stepladder finals in a best of three matchplay format on Saturday. The winner of the first match between the second and third seed will challenge for the title against the top seed.
Detailed scores: Women's Top 8 Quarter-Finals | Men's Top 8 Quarter-Finals.