CREATE TABLE table_48578 ("Date" TEXT, "Tournament" TEXT, "Surface" TEXT, "Opponent in the final" TEXT, "Score" TEXT)

In which tournament was Silke Meier the opponent in the final?
SELECT "Tournament" FROM table_48578 WHERE "Opponent in the final" = 'silke meier'
SELECT "Tournament" FROM "table_48578" WHERE "Opponent in the final" = 'silke meier'