A sliced drive or a flat drive? Being a former baseball player, I know that every throw has backspin on it and I was able to cover some major ground from the outfield before the ball ever touched the field. Since it's virtually impossible to throw a flat ball from the outfield, I was wondering which ball would go longer in tennis, flat or backspin. I'm guessing a backspin drive would, but I'm unsure of this. Anyone have an answer?