Duarte Gomes feels the future of VAR is "bright" despite the issues it has seen since its introduction.

The 2018 World Cup was the first competition to have VAR implemented, with the Premier League introducing it for the 2019-20 campaign.

It has been much-maligned in some quarters, though, particularly with fans who feel it has slowed games down and even got decisions wrong in some cases, such as Luis Diaz's incorrectly disallowed goal during Liverpool's loss at Tottenham earlier in the season.

Despite the teething problems, former FIFA referee Gomes still feels VAR's implementation has been a success, though he concedes it still has issues.

"I believe the future is bright for VAR," Gomes told Stats Perform. "I can see improvements in many situations, but I can also see some failures, which I believe is still normal at this level.

"The introduction of VAR, I believe it's the most important change in referees in history, so sometimes it takes time.

"They have to be fast and accurate and it's not easy. Sometimes they have to get the best image from the technician. So it's a growing process. But so many good decisions have been made, especially when it comes to offsides, goals. What is allowed or correctly validated after VAR. Also, violence that the referee cannot see on the pitch and happens very clearly."

Much of the frustration with VAR, at least in England, has centred on the perceived move away from only correcting clear and obvious errors, which was highlighted as the primary reason for its introduction.

Gomes agrees it should only be used for less subjective decisions, saying: "I believe that VAR should be exclusively used for very factual decisions. For example, like goalline technology on the goals or offside technology or with the line, that's very yes and no, black or white.

"When you have grey areas like pushing and holding and maybe a hand, maybe not. You have to change this. I think it will be better."

Gomes believes one area that could be improved would be to have officials whose sole role is VAR, rather than the current system of having referees and assistant referees in the VAR room.

"As for now, we have the career of an assistant referee," Gomes added. "We should have a career only for the VAR.

"They get their information only by having the decisions evaluated on TV on the screen. They should be professional at that, they cannot be referees and VARs at the same time."

Fans have a right to be concerned over the proposed introduction of blue cards in football, according to former FIFA referee Duarte Gomes.

Football lawmakers IFAB announced this month it would trial the implementation of blue cards, which would see players sin-binned for 10 minutes should they commit dissent or a cynical foul.

The announcement was met with concern, with the Premier League stating it would not be part of any trial, while FIFA also distanced itself from the proposals.

Gomes understands the concerns, although he also feels the introduction of blue cards could help to clamp down on dissent in the game.

"Yes, I understand fans' worries," Gomes told Stats Perform. "I understand that they are very emotional sometimes.

"They are very close to their teams, which kills the clarity in their minds. That's perfectly normal, and they have some right to be worried because this is something very strong.

"I think the idea is to prevent more things happening, not to be punished all the time. Maybe we pass the message in the first matches with a yellow, with a blue card, and then the players understand that when they go out for 10 minutes, they will be out of the match without participating.

"They will hurt their teams because they will be with one less player, and it will change a lot. So, this will be the good part, to make a statement to tell them 'don't do that'."

Gomes compared the proposals to VAR, which has undergone many teething problems since its introduction, saying: "I am sure that at this point, in what concerns for example, VAR, everybody with some distance and some clarity can say it was a very good measure because thousands and thousands of situations were corrected using VAR. So maybe this will happen with the blue card."

Gomes has reservations of his own, though, particularly in regards to how impacted teams will potentially look to shut the game down to get through their numerical disadvantage without their chances of victory being hurt.

"We need to balance that, because maybe one solution can create many problems for the referee and become the opposite of the spirit that is trying to be done," Gomes said.

Another worry is the impact of the blue cards on the tempo of the game, which is already under the spotlight with VAR. Gomes shares this view, too.

"I do have some worries about breaking time," Gomes continued. "Again, making the game less fluid and impacting on the emotions of people, because the match will depend on 10 and then 11 and then 10. And it stops and somebody will have to count the 10 minutes.

"There may be a small problem concerning the spectacle, so let's wait and see."

Gomes also highlighted football's uniqueness as a sport in relation to the intensity of emotion as another reason for fans' concerns, adding: "We cannot compare any other indoor sports that have the blue card with football, which is very different in the bigger atmosphere with lots of emotions involved, many, many people.

"Football is very peculiar, very sensitive, it's a world phenomenon, and when you want to change something, you have to do it very carefully, not to hurt the match, not to hurt the spectators, the emotions, but also the players and the teams, and the referees."