Cricket followers: Wouldn't hot spot be a better choice for the challenge system in Tennis?

I never really found hotspot to be all that conclusive even in cricket. It all depends on the sensitivity of the heat measuring device. I presume it's supposed to show the area that was heated up when the ball hits it. In cricket you use a heavier ball which has more energy, thus will heat up the bat more. In tennis, I'm not sure how much heat is actually transfered to the court. This all depends on the friction of the court which should be very low on grass. So if this technology is to work, it's going to be most effective on hardcourts, and least effective on grass.

Then you have to also consider how fast the heat spreads and how quickly the instrument can measure it. If the ball drops just outside the line, eventually the heat will flow to the line resulting in a blurred image that covers the line. A good analogy would be trying to locate the area on piece of blotting paper when a drop of ink falls. The problem is that when the ink falls it quickly begins to spread. Now try using the blotted image to retrace the original drop of ink.

I don't see Hotspot being as accurate as Hawkeye.

It doesn't hurt to try and see if it works because pinpoint accuracy is important in close games. I think this system could be tried on Australian and England tennis courts, because these two countries are cricket playing too, so it would be better to start from there. If it is successful, it could then be applied to other European countries and here of course.

infact that is a very good idea. the only problem is that there it probably cant zoom in close enough to get a conclusive call unless you had one focused on each line....but those cameras are expensive!

it would definitley be more accurate than hawkeye which is within 3mm.

or you could get one of those super-slow-mo cameras on the lines!