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Electronic line-calling will be used instead of line judges for U.S. Open games at all courts except the two largest arenas. There also will be three ball people instead of six at courts other than Arthur Ashe Stadium and Louis Armstrong Stadium. Those are among the modifications announced by the U.S. Tennis Association as it outlined plans for running its 2020 Grand Slam tournament amid the coronavirus pandemic. There will be no mixed doubles, juniors or wheelchair competition during the Aug. 31 to Sept. 13 U.S. Open. There also will not be any qualifying rounds. Men’s and women’s doubles will […]