They're the last line of defense, and so often, the man who is left with all the blame. Sometimes, they're the heroes of penalty shootouts; other times, they're not.
But throughout history of world football, many goalkeepers have become absolute legends of the game, etching their careers into the history books forever.
Fans in the past 100 years have seen some superb goalkeepers take their place between the sticks; this list seeks to bring the best 50 of those players together.
Note that this list isn't ranked: The players mentioned here are simply so talented in their own right, it would be unfair to them to try and split their achievements.
Let's take a look at the top 50 goalkeepers in history.