Arsenal boss Mikel Arteta was thankful VAR was in operation for their 2-0 win over Newcastle in the FA Cup and praised the growing importance of Emile Smith-Rowe.
The 20-year-old proved the difference for the holders and grabbed the opener in the 109th minute after the tie had gone to extra time.
It could have been a different ending for academy gradate Smith-Rowe had the video assistant referee not told referee Chris Kavanagh to review a decision deep into stoppage time.
Smith-Rowe was shown a red card for a challenge on Newcastle's Sean Longstaff, but after the pitchside monitor was used it was downgraded to a yellow and the youngster made the most of his reprieve to help the Gunners through to the fourth round.