Re: Bartoli's Serve and other players techniques
Well first of all, congratulate you on your aces.
So it is really two questions you are asking:
1.) Can players imitate others to improve mechanics?
2.) Can players work certain element or technique or game style (like counter-punching vs. volleyer) of another player's into his/her game?
To answer your questions, I am personally a fan of Justine. However, I would not imitate her groundstroke because hers require a lot of core strength which unless you are a dedicated athlete who does a lot of training in the core strength area, you won't be able to generate the kind of pace she hits in. This brings up the point about different body types, mechanics is very dependent on body type. Which means that it is almost impossible for Serena to play in Justine's mechanics because Serena is much taller and bulkier which means that she cannot achieve the same level of light footed-ness" as Justine even in her prime. With this being said, players can certainly work different elements into their game, like as you said, hitting with more wrist on her serves or having more shoulder turn. But at their level, their mechanics should be near perfect as much as other people criticize, because how else can they be the top of the world.
I am a supporter of Serenus Justinpovanovic.