ChartMate PRO has a lot of flexibility built into it. We included a function called "crucial factors" which allows a user to set their own variables to be charted. When Sven Groenveld was working with Greg Rusedski, he used ChartMatePro to chart the service return location of Pete Sampras. Sven wanted to know when Sampras returned the ball so he could advise Greg of where he would play his first volley. The rest is history, Greg defeated Sampras in the Paris Indoor final in 1998 in straight sets by "knowing" the part of the court to which Sampras preferred to hit his return of serve. Greg was there waiting for the volley.