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_92 ( round VARCHAR, grand_slam VARCHAR )

### Question ###
What is the round when Grand Slam was the Davis Cup?

### Accurate SQL ###

SELECT round FROM table_name_92 WHERE grand_slam = "davis cup"