CREATE TABLE table_26202788_7 (championship VARCHAR, opponent_in_the_final VARCHAR)

Marat Safin is the opponent in the final in what championship?
SELECT championship FROM table_26202788_7 WHERE opponent_in_the_final = "Marat Safin"
SELECT "championship" FROM "table_26202788_7" WHERE "Marat Safin" = "opponent_in_the_final"