Table schema:
CREATE TABLE table_name_51 (date VARCHAR, time VARCHAR, set_1 VARCHAR, score VARCHAR)

Question: What is the Date when the Set 1 is 25–21, and the Score is 3–0, and the Time is 11:00?
SQL: SELECT date FROM table_name_51 WHERE set_1 = "25–21" AND score = "3–0" AND time = "11:00"