CREATE TABLE table_31066 ("Week of" TEXT, "Tournament" TEXT, "Champion" TEXT, "Runner-up" TEXT, "Semifinalists" TEXT, "Quarterfinalists" TEXT)

Who were the semifinalists when sammy giammalva was runner-up?
SELECT "Semifinalists" FROM table_31066 WHERE "Runner-up" = 'Sammy Giammalva'
SELECT "Semifinalists" FROM "table_31066" WHERE "Runner-up" = 'Sammy Giammalva'