How to combine Futures of different types into a single Future without using zip()

val result: Future[(Class1, Class2, Class3)] = for {
  _ <- Future.unit
  val f1 = process1
  val f2 = process2
  val f3 = process3
  v1 <- f1
  v2 <- f2
  v3 <- f3
} yield (v1, v2, v3)