CREATE TABLE table_54502 ("Tournament" TEXT, "Date" TEXT, "City" TEXT, "Country" TEXT, "Surface" TEXT, "Singles champions" TEXT)

Who was the Singles Champions in Trieste, Italy?
SELECT "Singles champions" FROM table_54502 WHERE "Country" = 'italy' AND "City" = 'trieste'
SELECT "Singles champions" FROM "table_54502" WHERE "City" = 'trieste' AND "Country" = 'italy'