#3 West Germany 0-1 East Germany (1974 Group stage)
The group stage of 1974 FIFA World Cup was the first time East and West Germany played each other in international football. Hosts West Germany were the favorites to win the contest against their eastern neighbor, who were participating in their first world cup.
Both the sides played in good spirit, eliminating the possibility of an animosity-ridden encounter. Already qualified for the next round, West was subdued in their efforts. On the other hand, East Germany gave in their everything and came on top. The game ended with East Germany upsetting the hosts by one goal to nil.
Books like 'Where Were You When the Sparwasser Goal Was Scored' were written to immortalize this historic contest. To maintain a perfect record against their distinguished neighbors, East Germany declined any further outing against them. As a result, West Germany, with all its world cup and Euro triumphs, remained winless against their Eastern counterparts.