The little girl has a beautiful one handed slice back hand! She may be taking lessons from Rosewall. Notice she is using a full size racket, although it's almost bigger then she is, and is having no trouble swinging it through a full range of motion. Her take-back is high over her head, a la Fed, providing racket head momentum for plenty of power. Hopefully no one will try to get her to switch to a two hander for "more power". I wish they'd shown more of her and less of Jock. She looked like she was loving it all--future champion.