Is it better to have a fluid motion when serving, i tend to bring it up to my knees then lift the racquet facing sky to right side of shoulder. this restricts power as my racquet need to be behind right shoulder etc. i tried it last night and you get more power from a fluid motion that ends with racquet behind your right shoudler. A fluid motion gets this position but its hard to change too tips. And tips on second serve motion aswell,. Tips? thanks.