CREATE TABLE table_name_39 (partner VARCHAR, opponents_in_final VARCHAR)

What is the name of the partner who played in the final against Lucas Arnold Ker Mart n Garc a?
SELECT partner FROM table_name_39 WHERE opponents_in_final = "lucas arnold ker martín garcía"
SELECT "partner" FROM "table_name_39" WHERE "lucas arnold ker martín garcía" = "opponents_in_final"