Tennis-At the U.S. Open, that voice yelling 'Out!' comes from a computer

Sep 2, 2021; Flushing, NY, USA; Ashleigh Barty of Australia (right) after beating Clara Tauson of Denmark on day four of the 2021 U.S. Open tennis tournament at USTA Billie King National Tennis Center. Mandatory Credit: Robert Deutsch-USA TODAY Sports

(fixes spelling of Simona in fourth para)

NEW YORK (Reuters) -Ash Barty, the No. 1 seed at the U.S. Open, watched on match point as her opponent's backhand sailed long on Thursday, prompting the familiar sound of a linesman yelling, "Out!"