Why do I need to use andThen in order to pattern match Futures?

I found out that in order to pattern match Future fur Success/Failure, I need to use andThen (or onComplete, onSuccess...) and cannot use map. Why is that?

What I wanted to do (simplified, I am matching for Success and so on as well):

val f1 = Future(throw new Exception("Oops"))
f1 map { case Failure(e) => ??? }

Gives:

error: constructor cannot be instantiated to expected type;
 found   : scala.util.Failure[T]
 required: Nothing
       f1 map { case Failure(e) => ??? }

What I ended up doing:

val f1 = Future(throw new Exception("Oops"))
f1 andThen { case Failure(e) => ??? }

I would like to understand why map cannot be used here.