Is there a cleaner way to pattern-match in Scala anonymous functions?

I find myself writing code like the following:

val b = a map (entry =>
    entry match {
        case ((x,y), u) => ((y,x), u)
    }
)

I would like to write it differently, if only this worked:

val c = a map (((x,y) -> u) =>
    (y,x) -> u
)

Is there any way I can get something close to this?