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_23259077_1 (year INTEGER, opponent_in_the_final VARCHAR)

### Question ###
On what year did Newcombe first face Clark Graebner in a final match?

### Accurate SQL ###

SELECT MIN(year) FROM table_23259077_1 WHERE opponent_in_the_final = "Clark Graebner"