CREATE TABLE table_47431 ("Date" CLOB, "Tournament" CLOB, "Surface" CLOB, "Opponent" CLOB, "Score" CLOB)

What was the Opponent in the Tarragona Tournament?
SELECT "Opponent" FROM table_47431 WHERE "Tournament" = 'tarragona'
SELECT "Opponent" FROM "table_47431" WHERE "Tournament" = 'tarragona'