Akka actor to calculate a soccer league rank
For starters you could try sending commands to you Actor instead of Nouns(source: Reactive Messaging Patterns with the Actor Model). 


Put commands into a companion object for Actor. 
Name commands in past tense.
Remove your "literal match" [Message("getRank")] and create a Command(type-safet) to handle the method.


See this thread for information on naming Commands. 
https://stackoverflow.com/questions/12510535/naming-convention-for-commands-events