Australian Open (1) เล่นบนพื้นผิวใด?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
What surface was the Australian Open (1) played on?It is not neccessary to use all the tables.
 table_name_84:  surface [ VARCHAR]  championship [ VARCHAR] 
SELECT surface FROM table_name_84 WHERE championship = "australian open (1)"