I don’t know what the replay system in pro tennis is called.

But the UFL has adapted it to football in the spring. It measures pretty accurate. It measures the distance to the first down based on where the ref spots the ball. That system wouldn’t have helped in the AU/UGA game on the goal I don’t believe. It wouldn’t take much you would think to make it detect when the ball breaks the plain. A system like that would take a lot of stress off the refs and take a lot of controversy out of the game. It may do that already and I’m just not aware. I know very little about it other than the UFL uses it.