Bill, Scott Ford, a USPTA pro with some addional credentials, has a few articles on tennisone about playing in the 'zone'. The most recent one discusses vision. His claim is that it's best to focus on your contact zone and where the ball enters this zone. He says that watching the ball all the way from your opponent's racquet is allowing you to approximate speed and direction, but at higher ball speeds, your brain is more likely to make judgement errors which will result in bad timing. By watching the contact zone, he claims that it is easier for your brain to calculate correct timing because you are not relying on your abilities to refocus. He even points out how this contradicts the conventional advice of watching the ball and the hit-bounce-hit method. I get the impression that you are not a tennisone member and won't be able to check out the article, but the guy has a website: www.arete-sports.com . The website has one of his tennisone articles on it, but it's not the one on vision that I am referring to. What do you think? Hopefully I paraphrased well enough for you to understand the point of the article. If you have questions, let me know and I'll go back to the article to see if I can answer them.