Harry Arter says Ireland's last game against Georgia left him feeling like they had just played Manchester City.
The World Cup qualifier in Tbilisi in 2017 ended in a 1-1 draw and Arter was part of the midfield that went missing after Shane Duffy had headed the Boys in Green into an early lead.
The hosts enjoyed 79% of possession and the Cardiff player conceded that the team, then under Martin O'Neill, were completely "out-played".
New manager Mick McCarthy's reign got off to an underwhelming start as they struggled to a 1-0 win in difficult conditions in Gibraltar on Saturday.
And Arter, who has 15 caps, has warned that performances like the draw two years ago simply won't be good enough against the team ranked 91st in the world.
"The most disappointing thing that night was that we got out-played," the 29-year-old, who compared the disparity to how many teams feel after playing the Premier League champions, told reporters.
"They completely dominated.
"I remember feeling like we’d just played Man City, and that’s not right. Technically they were a lot better than us.
"Collectively, we were really poor. The only positive is that we got a draw. But it was a wake-up call to realise that this probably isn't good enough.
"To feel like you're playing against a top, top nation - and I’m talking very, very good that night - that wasn’t right for it to be against Georgia.
"We thought it was going to be an easy game and found out it certainly wasn’t.
"It’s important that we learn from that. It’s no disrespect to Georgia. They, as a group, haven’t got the experiences of playing in the Premier League, the Championship - two top leagues.
"We really have to take responsibility for that night. I know I did. I was really disappointed in my own performance.
"I’m sure the gaffer will have us prepared for them now. It's going to be tough."
Follow Republic of Ireland v Georgia (kick-off 7.45pm) with our live blog on RTÉ Sport Online or the RTÉ News Now app, watch live on RTÉ2 or listen live on RTÉ 2fm's Game On.