The future is now: US Open qualifying tests clocks, coaching

NEW YORK (AP) -- Right there on Court 4's electronic scoreboard at the U.S. Open, blue numbers counted down the 25 seconds allowed before a player was required to serve. When the readout dropped all the way to zero, the chair umpire announced a warning for a time violation....

from AP Top Sports News at 2:14 a.m. EDT http://ift.tt/2w3h53w