CREATE TABLE table_15002265_1 (mens_doubles VARCHAR(255), mens_singles VARCHAR(255), womens_singles VARCHAR(255))
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"