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_21001903_2 ( mens_singles VARCHAR, womens_singles VARCHAR, tour VARCHAR )

### Question ###
when womens singles is wang yihan and tour is french super series, what were the men's singles?

### Accurate SQL ###

SELECT mens_singles FROM table_21001903_2 WHERE womens_singles = "Wang Yihan" AND tour = "French Super Series"