hey i do know tennis thank you very much
technology maybe not be changing the sports you mentioned yahoo because they are do not rely solely on the technology itself.
for example in golf. golf clubs are being advanced so much that all most holes are being stretched(distance increased) fields because of the clubs ability to whack the ball really long distances. when swinging golf clubs its about the momentum and angle not strength so technology does play a big part in golf. jack nicholas a legendary golfer criticized this and so have other golfers as well.