CREATE TABLE table_name_50 (outcome VARCHAR2, surface VARCHAR2, score VARCHAR2)

Which outcome has a Surface of clay and a Score of 4 6, 7 5, 2 6?
SELECT outcome FROM table_name_50 WHERE surface = "clay" AND score = "4–6, 7–5, 2–6"
SELECT "outcome" FROM "table_name_50" WHERE "4–6, 7–5, 2–6" = "score" AND "clay" = "surface"