Tennis question.....?

Question

im watchin tennis right now and they do a replay of where the ball landed exactly like a generated replay....how do they know exactly where the ball went its impossible unless they have thousands od cameras covering every inch of the grass......i dont think thats reliable

Answer 1

It's a system they first used in Cricket, and it's called "Hawk Eye". It's named after the back-room bloke called Hawkins who invented it, so it's said. It's d**n cool isn't it?

Read all about it here:

http://www.hawkeyeinnovations.co.uk/

Answer 2

My understanding is that Wimbledon has around 10 high-speed cameras around the court (no under-grass wires). Using the images from these cameras combined with the ball's trajectory and speed Hawkeye is able to predict where the ball is most likely to have landed. It's not a replay of what actually happened, just a highly-likely statistical prediction.