A more technical question now.
If I think of Sam Stosur, she has a great kick serve, but we all know it is predicatble and the very best returners are waiting for it, there are certain serves Sam cannot do to a very high level.
Her serve down the middle on the ad court can be much better. But her serve is limited by how she holds the racquet, if anyone else has observed it, does she use a forehand grip to come round the ball to get the kick? It looked like a forehand grip to me when I see close up clips.
As far as I can tell, to hit all of the serves with great disguise and a lot of spin, the continental grip still gets the job done doesn't it?