on this link here."The system was tested and proved functional prior to the start of the match... and confirmed as working by the match officials."The system has remained functional throughout."Hawk-eye unreservedly apologises to the Premier League, Sheffield United, and everyone affected by this incident."Oliver tried to explain to Blades boss Chris Wilder in the Villa Park tunnel what had happened.It became apparent that the referee had tested his watch at half time where it did work.But the cameras being blocked from seeing the ball around the stadium resulted in no goal being awarded on the pitch..
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