Marcos Alonso claimed VAR caused confusion in Chelsea's 1-0 loss to Totteham and says the technology needs to be adapted going forward.
The Blues fell to a defeat in the first leg of their Carabao Cup semi-final, with Spurs going ahead thanks to retrospective action from the officials.
Harry Kane was adjudged offside by the linesman when he was taken out by goalkeeper Kepa Arrizabalaga, but the decision was reversed after replays suggested the striker was level with Chelsea's last man.
But Alonso was unhappy with how the decision was brought about, and told the Evening Standard: "Maybe [we were] unlucky because they only had one chance and it was thanks to the linesman, the VAR.