CREATE TABLE table_name_42 (tournament VARCHAR, opponent_in_the_final VARCHAR)

Olga Blahotov was the opponent in the final at what tournament?
SELECT tournament FROM table_name_42 WHERE opponent_in_the_final = "olga blahotová"
SELECT "tournament" FROM "table_name_42" WHERE "olga blahotová" = "opponent_in_the_final"