\rbrIn this video coach Simon breaks down some of the main differences between the Roger Federer and Pate Sampras serves.\rbrTwo of the biggest differences are:\rbr\rbr1. Sampras stretches the left side of his body much more than Federer in the trophy position, Federer is much straighter in that position\rbr\rbr2. Sampras uses more of a snap finish with his elbow bending very quickly after cont whereas Federer has a much more extended arm on the follow through\rbr\rbrSampras also rotates a little more in the trophy position.