We see couple of trends: 1.SHORTENING of a BACKSWING phase see the first part of http://www.tennisunleashed.net/rafae...change-part-1/ by Jason Frausto. If the link above does NOT work try xxxhttp://www.tennisunleashed.net/rafael-nadal-the-master-of-change-part-1/ AFTER removing xxx in the front of the link directly above. The article by Jason Frausto is based on an analysis of backhand of Nadal. The phrase "SHORTENING" can be understood in two DIFFERENT meanings: First,when a given player shortens his backswing compared to a previous stage of his/her career/development. SECOND,when a player has a SHORTER backswing compared to another player. 2.SHORTENING of a FORWARD phase (defined as a FORWARD motion till a CONTACT). The forward phase lasts around 120 miliseconds or less It consists of two parts: FORWARD and DOWN movement FORWARD and UP movement (the latter component lasts less than 80 miliseconds). see http://www.youtube.com/watch?v=lPBM-hE1Dhw 3.variability of a FOLLOWTHROUGH The follow through of Djokovic is discussed in the end part of http://www.youtube.com/watch?v=Ed3S-X1Xiv4 This post is dealing mainly with flat/topspin baseline strokes. Returns of serve are basically different kind of animal. Please see post #27 of this thread for a comparison. RECOMMENDATIONS based on observations above: 1.shorten a backswing stage Julian W.Mielniczuk USPTA Bedford PS1 There are some differences between,say,Djokovic and Nadal In the case of Djokovic please see http://www.youtube.com/watch?v=Ed3S-X1Xiv4 PS2 This post is loosely related to my previous post/link comparing one-single handed backhand and double handed backhand.