CREATE TABLE table_75929 ("Outcome" CLOB, "Year" FLOAT, "Championship" CLOB, "Surface" CLOB, "Opponent" CLOB, "Score" CLOB)

What surface was the Australian Open (1) played on?
SELECT "Surface" FROM table_75929 WHERE "Championship" = 'australian open (1)'
SELECT "Surface" FROM "table_75929" WHERE "Championship" = 'australian open (1)'