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_name_31 (championship VARCHAR, opponent_in_the_final VARCHAR)

### Question ###
What was the name of the opponent Tommy Haas played in the Championship?

### Accurate SQL ###

SELECT championship FROM table_name_31 WHERE opponent_in_the_final = "tommy haas"