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_54 (opponent VARCHAR, res VARCHAR, event VARCHAR)
### Question:
Who was the fight against when loss was the result at the Gladiator Challenge 87: Collision Course event?
### Answer:
SELECT opponent FROM table_name_54 WHERE res = "loss" AND event = "gladiator challenge 87: collision course"