Table schema:
CREATE TABLE table_name_74 (partner VARCHAR, opponents VARCHAR, outcome VARCHAR, surface VARCHAR)

Question: Who was the partner on the game which took place on a clay surface with opponents of marco chiudinelli michael lammer and a runner-up result?
SQL: SELECT partner FROM table_name_74 WHERE outcome = "runner-up" AND surface = "clay" AND opponents = "marco chiudinelli michael lammer"