CREATE TABLE table_12279 ("Outcome" CLOB, "Date" CLOB, "Tournament" CLOB, "Surface" CLOB, "Opponent" CLOB, "Score" CLOB)

Which Tournament has a Opponent of piero luisi?
SELECT "Tournament" FROM table_12279 WHERE "Opponent" = 'piero luisi'
SELECT "Tournament" FROM "table_12279" WHERE "Opponent" = 'piero luisi'