Defender Timm Klose has since admitted he had fouled Willian as the Brazilian weaved into the box, before going over and then being cautioned for diving by Scott.

Chelsea eventually prevailed 5-3 on penalties to set up a fourth-round tie with Newcastle, after Jamal Lewis’ late header had cancelled out Michy Batshuayi’s opener in the 55th minute.

The home side finished with nine men following red cards for Pedro and Alvaro Morata, who was shown a second yellow by Scott for protesting at the referee’s decision not to award a penalty when he took a tumble under a challenge from Christoph Zimmermann.

The fall-out from the VAR controversy at Stamford Bridge on Wednesday night followed on after the system had been used 24 hours earlier to award a goal for the first time in Leicester’s replay against Fleetwood.

Kelechi Iheanacho’s second effort on 77 minutes had initially been disallowed for offside, a decision which was overturned following review to the VAR by referee Jonathan Moss as the Foxes won 2-0 on Tuesday night.

Frenchman Wenger has long been an advocate of video technology, but accepts there is still work to be done on all sides as to just how it is implemented successfully.

"What you want is to improve the system that exists at the moment and we will contribute to improve it," said Wenger, who is the longest serving manager in English football.

"There are some hiccups at the start of the functioning certainly and we need to clear up the way it works, yes I agree.

"Is that enough to renounce [the current system]? I would say no, I am still a fervent supporter of it and I believe we have to move forward with it and improve the system certainly, but we have to go with it.

"You cannot imagine that in the future it will not be used. We will have to find the proper way to do it, but it has to go that way."

PA