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_1 (surface VARCHAR, opponents_in_the_final VARCHAR)
### Question:
On what surface was the tournament with opponents kathleen horvath marcella mesker in the finals?
### Answer:
SELECT surface FROM table_name_1 WHERE opponents_in_the_final = "kathleen horvath marcella mesker"