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_6 ( first_match VARCHAR, final_position VARCHAR, competition VARCHAR )

### Question ###
What was the date of the first match of the Fifa Club World Cup that ended with the final position as winners?

### Accurate SQL ###

SELECT first_match FROM table_name_6 WHERE final_position = "winners" AND competition = "fifa club world cup"