CREATE TABLE table_50315 ("Outcome" CLOB, "Date" FLOAT, "Championship" CLOB, "Surface" CLOB, "Opponent" CLOB, "Score" CLOB)

What is the date of the match against John McEnroe with a Score of 3 6, 6 3, 2 6?
SELECT "Date" FROM table_50315 WHERE "Opponent" = 'john mcenroe' AND "Score" = '3–6, 6–3, 2–6'
SELECT "Date" FROM "table_50315" WHERE "Opponent" = 'john mcenroe' AND "Score" = '3–6, 6–3, 2–6'