US OPEN TO FEATURE ELECTRONIC LINE CALLING ON ALL COURTS AT THIS YEAR’S TOURNAMENT WHITE PLAINS, N.Y., June 29, 2018 – The USTA today announced that electronic line calling will be utilized on all tournament courts at the USTA Billie Jean King National Tennis Center for the first time at the 2018 US Open.  In 2006, the US Open became the first Grand Slam event to use … [Read more...] about US Open to Feature Electronic Line Calling on All Courts