I am not a tennis player. So let me ask you: Is it not allowed to move while the ball is being tossed? Is Fed's movement different to what Andy and other players do when stepping into the court to take the return early?
My question too because I can't see why what Fed is doing is seen as being unacceptable, although it's so long since I played the sport that maybe I'm missing something here.
I'm pretty sure the first player that did this was Edberg.
Now all is explained. So the idea came from Fed's coach and not Fed himself, yet he's claiming all the credit for it?