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_23235767_4 (championship VARCHAR, surface VARCHAR, opponent_in_the_final VARCHAR)

### Question ###
Name the championship for clay and corrado barazzutti

### Accurate SQL ###

SELECT championship FROM table_23235767_4 WHERE surface = "Clay" AND opponent_in_the_final = "Corrado Barazzutti"