Table: wtatour_matchups
Columns: week_of
tier
winner
runner_up
semi_finalists

Question: What is Winner, when Week is 8 May, when Semi Finalists is Helena Suková Mary Pierce, and when Runner-Up is Conchita Martínez Patricia Tarabini?
SQL: SELECT "winner" FROM wtatour_matchups WHERE "week_of" = '8 may' AND "semi_finalists" = 'helena suková mary pierce' AND "runner_up" = 'conchita martínez patricia tarabini'

Question: What is Week, when Semi Finalists is Sandrine Testud Yone Kamio?
SQL: SELECT "week_of" FROM wtatour_matchups WHERE "semi_finalists" = 'sandrine testud yone kamio'