Who is the opponent in the fight of 1 round when the record is 18-7?
CREATE TABLE table_name_81 (
    opponent VARCHAR,
    round VARCHAR,
    record VARCHAR
)
SELECT opponent FROM table_name_81 WHERE round = "1" AND record = "18-7"
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 is the opponent in the fight of 1 round when the record is 18-7? ### Input: CREATE TABLE table_name_81 (
    opponent VARCHAR,
    round VARCHAR,
    record VARCHAR
) ### Response: SELECT opponent FROM table_name_81 WHERE round = "1" AND record = "18-7"