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_11900378_1 (doubles_champions VARCHAR, tournament VARCHAR)
  ### Question:
  How many doubles champions were there for the Serbia f6 Futures tournament?
  ### Answer:
  SELECT COUNT(doubles_champions) FROM table_11900378_1 WHERE tournament = "Serbia F6 Futures"