Does having coach after coach after coach help an individual? I personally do not believe that its the coach, it's the player.
in Caroline's case, just maybe it will improve her abilities a bit, but i cannot see it drastically helping her. as for Maria S. i refuse to believe that anything is going to help her finally defeat Serena Williams after 9 years and counting..
I find it odd too that Caroline has been able to been serena on a bad day, but not pova. interesting. Maybe Caroline is willing to actually listen to her coach, where as pova isnt.