Manchester United overcame the video assistant referee's controversial intervention and reached the FA Cup quarter-finals thanks to Romelu Lukaku's brace at Huddersfield.
While the decision to utilise technology and aid officials has been widely embraced, the trial period has not been without its hiccups in the English game and beyond.
The teething troubles continued as Juan Mata saw an effort cancelled out for the narrowest of offsides - with some strangely skewed lines superimposed on the screen - but Lukaku goals early in each half ensured United progressed with a 2-0 fifth-round win at Huddersfield.