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_54 (outcome VARCHAR, opponent VARCHAR, surface VARCHAR)

### Question ###
Which Outcome has an Opponent of wendy turnbull, and a Surface of grass?

### Accurate SQL ###

SELECT outcome FROM table_name_54 WHERE opponent = "wendy turnbull" AND surface = "grass"