In my native language they say:
A L' E' INUTIL INSEGNA' AL MUS, SI PIART TIMP E IN PLUI SI INFASTIDIS LA BESTIE!!
(translated) There is no gain in teaching the donkey, you waste your time and annoy the beast
It´s not her official coach its sven groenefeld former Ana Ivanovic coach and he is one of the coaches of adidas team which is Sorana part of during the offf season she was not with sven but with darren cahill and maybe mats (both are from adidas too) now in sydney there she was hitting with sven he was writing it in his blog.