CREATE TABLE table_name_28 (date VARCHAR, surface VARCHAR, opponent_in_the_final VARCHAR)

On what date was the surface clay with Cyril Saulnier as the opponent in the final?
SELECT date FROM table_name_28 WHERE surface = "clay" AND opponent_in_the_final = "cyril saulnier"
SELECT "date" FROM "table_name_28" WHERE "clay" = "surface" AND "cyril saulnier" = "opponent_in_the_final"