Table schema:
CREATE TABLE table_15002265_1 (mens_doubles VARCHAR, mens_singles VARCHAR, womens_singles VARCHAR)

Question: who is the the mens doubles with mens singles being jürgen koch and womens singles being sabine ploner
SQL: SELECT mens_doubles FROM table_15002265_1 WHERE mens_singles = "Jürgen Koch" AND womens_singles = "Sabine Ploner"