Who was the Opponent in the match with a Score of 6 3, 6 4?
CREATE TABLE table_50189 (
    "Outcome" text,
    "Date" text,
    "Tournament" text,
    "Surface" text,
    "Opponent" text,
    "Score" text
)
SELECT "Opponent" FROM table_50189 WHERE "Score" = '6–3, 6–4'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: Who was the Opponent in the match with a Score of 6 3, 6 4? ### Input: CREATE TABLE table_50189 (
    "Outcome" text,
    "Date" text,
    "Tournament" text,
    "Surface" text,
    "Opponent" text,
    "Score" text
) ### Response: SELECT "Opponent" FROM table_50189 WHERE "Score" = '6–3, 6–4'