The possibility of some tantalizing matchups between four great teams is what makes the Champions League draw on Friday special.
The draw will be an open one, meaning any team can face any team and there will be no seeding.
It will also be the case of Germany against Spain as Barcelona, Bayern Munich, Borussia Dortmund and Real Madrid are the semifinalists of Europe's most illustrious club competition.
Each team has won the competition at least once, but in recent times Barcelona has been the dominant force in the competition.
Dortmund would be the underdogs in every situation but they would be extremely dangerous ones.
Here are some storylines to look forward to in each scenario for the Champions League.
*Unless otherwise stated all statistics courtesy of UEFA.com.