CREATE TABLE table_66426 ("Outcome" CLOB, "Date" CLOB, "Tournament" CLOB, "Surface" CLOB, "Opponent" CLOB, "Score" CLOB)

When was the score 3-6 4-6?
SELECT "Date" FROM table_66426 WHERE "Score" = '3-6 4-6'
SELECT "Date" FROM "table_66426" WHERE "Score" = '3-6 4-6'