CREATE TABLE table_1918850_2 (surface VARCHAR2, championship VARCHAR2, score_in_the_final VARCHAR2)

state the number of surface where championship is australian open and score in the final is 6 3, 4 6, 11 9
SELECT COUNT(surface) FROM table_1918850_2 WHERE championship = "Australian Open" AND score_in_the_final = "6–3, 4–6, 11–9"
SELECT COUNT("surface") FROM "table_1918850_2" WHERE "6–3, 4–6, 11–9" = "score_in_the_final" AND "Australian Open" = "championship"