CREATE TABLE table_name_20 (opponent_in_the_final VARCHAR2, surface VARCHAR2, tournament VARCHAR2)

Who is the opponent in the final with a clay surface at the Tournament of Lyneham?
SELECT opponent_in_the_final FROM table_name_20 WHERE surface = "clay" AND tournament = "lyneham"
SELECT "opponent_in_the_final" FROM "table_name_20" WHERE "clay" = "surface" AND "lyneham" = "tournament"