Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_26202788_7 ( championship VARCHAR, opponent_in_the_final VARCHAR )

### Question ###
Marat Safin is the opponent in the final in what championship?

### Accurate SQL ###

SELECT championship FROM table_26202788_7 WHERE opponent_in_the_final = "Marat Safin"