CREATE TABLE table_name_6 (date VARCHAR, outcome VARCHAR, surface VARCHAR, score VARCHAR)

Name the date when the surface was clay and the score was 6 1, 6 2 and runner-up
SELECT date FROM table_name_6 WHERE surface = "clay" AND score = "6–1, 6–2" AND outcome = "runner-up"
SELECT "date" FROM "table_name_6" WHERE "6–1, 6–2" = "score" AND "clay" = "surface" AND "outcome" = "runner-up"