CREATE TABLE table_49189 ("Date" TEXT, "Tournament" TEXT, "Surface" TEXT, "Opponent" TEXT, "Score" TEXT)

What is the Opponent of the Banja Luka Tournament with a Score of 4 6, 4 6?
SELECT "Opponent" FROM table_49189 WHERE "Score" = '4–6, 4–6' AND "Tournament" = 'banja luka'
SELECT "Opponent" FROM "table_49189" WHERE "Score" = '4–6, 4–6' AND "Tournament" = 'banja luka'