Arsenal manager Jonas Eidevall was left angered by a lack of intervention from VAR in their narrow Champions League defeat at Bayern Munich.
The Gunners went down 1-0 at the Allianz Arena thanks to Lea Schuller's powerful 39th-minute header settling the quarter-final first leg. But Arsenal controlled much of the game and created a number of clear cut chances in the second half.
They also had two strong penalty appeals rejected. Caitlin Foord's shot looked to have been blocked by Glodis Viggosdottir's arm early on, while defender Rafaelle Souza appeared to be the victim of a clear shirt pull on a set-piece, only moments before Stina Blackstenius had an effort cleared off the line.
VAR was in-use in the quarter-final after it was absent from the previous rounds of the competition. But on neither decision did an on-field review take place.
In addition, goal-line technology is not compulsory and wasn't in use in the first leg of the tie. After the game Eidevall questioned why the technology wasn't used and believes his team should have had two clear two penalties.
"Part of me is proud, part of me is disappointed we can't be more clinical with our chances," Eidevall said. "Part of me is angry because obviously VAR was not working in the Allianz Arena tonight. It must be someone sitting there not looking at the pictures.
"Because it is clear and obvious those two penalty situations. I think that is unacceptable. There is a pull of a shirt and that handball situation in the first-half. I also think that one is clear.
"When we look at this competition, tonight highlights a couple of issues. VAR is only introduced in the quarter-finals, with referees that I don't know if they have used VAR before tonight. I don't know.
"Secondly, goal-line technology is something that you can use at any stage, but it is not compulsory. Today it was not in-use because Bayern choose not to pay for it. Next week at the Emirates, Arsenal have choose to use it, because we think it is fair for the competition. It is a problem for the competition that not every game has the same level of technology."
Despite the defeat, Arsenal were the better side for much of the first leg, creating plenty of chances aside from the penalty appeals. And Eidevall still believes his side can turn the tide and make it through to the last four of Europe's premier competition.
"We need to score at least one next week," Eidevall joked when asked what his side need to do to progress. "But we need to still manage their threats. They are a very good counter-attacking team.
"But you need to be brave on the ball and push them into their own half. If we can continue to do that and do that in front of our own fans at the Emirates, I think we have a good chance (of progressing)"
