Bye Bye Hawkeye!!
There is a cheaper system coming.
FoxTenn boasts its margin of error better than that of Hawk-Eye. It uses slow-motion video replay, not graphically-recreated approximations of the ball’s trajectory.
Apparently the system was tested out on more than one million tennis balls, with the margin of error “reduced almost to zero.” It also is said to be cheaper than Hawk-eye to install.
Already succesfully tested last year in ATP Metz & Antwerp and this year's ATP Barcelona.