CREATE TABLE table_8289 ("Outcome" TEXT, "Date" TEXT, "Tournament" TEXT, "Surface" TEXT, "Partner" TEXT, "Opponents" TEXT, "Score" TEXT)

Which tournament had an opponent of petra krejsov tereza smitkov ?
SELECT "Tournament" FROM table_8289 WHERE "Opponents" = 'petra krejsová tereza smitková'
SELECT "Tournament" FROM "table_8289" WHERE "Opponents" = 'petra krejsová tereza smitková'