question: Which tournament has an opponent in the final of nadia petrova and a score of 6–3, 4–6, 6–1??
answer: SELECT tournament FROM table_name_22 WHERE opponent_in_the_final = "nadia petrova" AND score = "6–3, 4–6, 6–1"
context: CREATE TABLE table_name_22 (tournament VARCHAR, opponent_in_the_final VARCHAR, score VARCHAR)