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_197638_6 ( age INTEGER, player VARCHAR )

### Question ###
At what age did Roy Emerson complete the Grand Slam?

### Accurate SQL ###

SELECT MAX(age) FROM table_197638_6 WHERE player = "Roy Emerson"