text: Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
  ### Context:
  CREATE TABLE table_1918850_2 (surface VARCHAR, championship VARCHAR, score_in_the_final VARCHAR)
  ### Question:
  state the number of surface where championship is australian open and score in the final is 6–3, 4–6, 11–9
  ### Answer:
  SELECT COUNT(surface) FROM table_1918850_2 WHERE championship = "Australian Open" AND score_in_the_final = "6–3, 4–6, 11–9"