Federer's serve

[chris1992]

Im starting to try it out. He looks so relaxed and fluid when hitting it and its as if he is throwing a ball over the net. Hewitt's is quite stiff and doesnt look as comfortable in my opinion, what do you think? both obviously work for them but i just cant help thinking that going into a 5th set, roger must still feel relaxed when serving.

http://www.youtube.com/watch?v=-CkWo7K5MDA

http://www.youtube.com/watch?v=fD423gYVLoM