I live at 5200 feet and read a lot of instruction but I haven't seen anything that specifically addresses the fact that playing at altitude is a somewhat different beast than playing below 1500 feet or so. I'm wondering if playing at altitude suits certain strategies better than others. High-altitude balls are supposed to help minimize the difference but people that I have talked to that play both have said that for a given amount of topspin, the ball moves a lot more. So, is the best strategy to simply add EXTRA spin or is it best to compensate other ways? For instance, is it better to concentrate on putting extra spin on the ball to get it to fall in when I hit from the baseline or is this futile and I should concentrate on improving touch instead? Is serve and volley a better strategy (a necessity?) than it is at lower altitudes due to the fact that you get to hit down rather than having to hit horizontally? Do you put a higher priority on hitting cross-court due to the extra length involved? Is it so hard to develop a really good kick serve that I'm better off working on an "easy" flat serve for a second serve?