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_24431264_18 (rank VARCHAR, withdrew_due_to VARCHAR)
### Question:
List the rank of the player that left the tournament due to right foot injury
### Answer:
SELECT COUNT(rank) FROM table_24431264_18 WHERE withdrew_due_to = "right foot injury"