CREATE TABLE table_name_68 (date INT, score VARCHAR)

Which Date has a Score of 7 6(3), 4 6, 6 2?
SELECT SUM(date) FROM table_name_68 WHERE score = "7–6(3), 4–6, 6–2"
SELECT SUM("date") FROM "table_name_68" WHERE "7–6(3), 4–6, 6–2" = "score"