Instead, the tournament uses Hawk-Eye Live, an electronic line-calling system, to determine whether a tennis shot is in or out. Electronic line-calling has been around tennis since the 1980s, dating back to Cyclops, a system used during Wimbledon to judge if a ball was in play or not. "During that match, the U.S. Open was trialing a Hawk-Eye system," said Clarey. After the match, Williams received an apology and the umpire was dismissed. "The NBA have chosen Sony and Hawk-Eye technology because it raises the level of their game," said Theresa Alesso, president of Imaging Products and Solutions Americas at Sony.

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Persons: Christopher Clarey, Roger Federer, Paul Hawkins, it's, Serena Williams, Jennifer Capriati, Williams, Ben Figueiredo, Figueiredo, Craig O'Shannessy, Novak Djokovic, We've, Theresa Alesso Organizations: U.S ., New York Times, International Tennis Federation, Australian, U.S, Sony, WNBA, MLS, NFL, NBA, Imaging Products, Solutions Locations: Wimbledon, U.S