CREATE TABLE table_33874 ("Player" CLOB, "Ranking" CLOB, "Event" CLOB, "Surface" CLOB, "Round" CLOB, "Score" CLOB)

Which Surface has a Score of 2009 wta tour?
SELECT "Surface" FROM table_33874 WHERE "Score" = '2009 wta tour'
SELECT "Surface" FROM "table_33874" WHERE "Score" = '2009 wta tour'