Instant replay coming to U.S. Open

The same technology that’s been used by the sports networks for several years will now be used as an on-court officiating tool for the U.S. Open next week. Powered by Hawk-Eye Innovations, the system can measure ball position to within three millimeters using eight cameras. “Hawk-Eye’s great,” says John McEnroe. “People always say to me, ‘Well you’d have no one to yell at, John!’ And my answer to that is: ‘I would find someone in the crowd!’”