Originally Posted by sureshs
As long as they are not used to filter out kids, I suppose they are OK. But I suspect they will be used to reject kids, sooner or later.
Also, why not just observe matches to see if the kid runs fast or not? Or serves fast or not? What is the need to quantify?
You make valid points. I originally asked this question to see how my son compared to other players his age. It makes for a good comparison of speed on the court. It does not take into account other factors such as anticipation or the ability to read the point as it happens.