Bayern Munich were chasing the Bundesliga title in 1994, two points ahead of Kaiserslautern, when FC Nurnberg arrived at the Olympic Stadium in April.
But when a corner from the right was flicked into the feet of Bayern defender Thomas Helmer, the game entered history.
Helmer appeared to lose the ball under his feet and could not control it, before appearing to kick it wide of Nurnberg goalkeeper Andreas Kopke's post.
Helmer fell behind the goal line and was picked to his feet by the relieved keeper, but both were surprised when match official Hans Joachim Osmers awarded the goal on the advice of linesman Jorg Jablonski. Helmer celebrated with his Bayern teammates while the Nurnberg players were perplexed.
The game finished 2-1 to Bayern but the Nurnberg protests resulted in a replay, which the visitors lost 5-0. If the game had finished 1-1, Bayern would not have won the Bundesliga that season and Nurnberg would not have been relegated.