Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_81 (matches INTEGER, round VARCHAR)
### Question:
What is the average Matches, when Round is Third Qualifying Round?
### Answer:
SELECT AVG(matches) FROM table_name_81 WHERE round = "third qualifying round"