Donít worry about a possible criticism, when I post a picture those are the kinds of things I am hoping to get so I know where to improve. I am certainly not an expect, but I can tell you what I have learned regarding the focus. For sports you want to shot in Al Servo mode and use a single focus point. The challenge with the single point is keeping on the personís body while they are moving. It can be very easy to slip under an arm and focus on the back ground. With the 7D I was using you can select a center zone which give a larger area to hold on the personís body. I suspect part of blurring in my images could have been improved by a faster shutter speed.