Table schema:
CREATE TABLE table_name_33 (tournament VARCHAR, partner VARCHAR, opponent_in_the_final VARCHAR)

Question: What Tournament did Silva Partner with Nicole Thijssen with Opponent in the final Nina Bratchikova & Frederica Piedade?
SQL: SELECT tournament FROM table_name_33 WHERE partner = "nicole thijssen" AND opponent_in_the_final = "nina bratchikova & frederica piedade"