Even with a 50 MPH wind gusting against you and skills and pure strength to be able to smack a forehand at 130 MPH it won't be the Hakugei, since the ball would stay at the same altitude. If anything the normal topspin stroke depicted in the anime won't be sufficient in generating the immense backspin needed to make the ball fly up vertically. It's impossible to generate the extreme slice-spin from a single human being even counting additional spin from the ball possibly hitting the frame of the racket at the right angle.Originally Posted by magictos
So in short,
Is it scientifically possible? Yes, you can set up a laboratory situation with the ability to make the ball do that.
Is it possible for someone to do it in an actual game of tennis? Hell no.