Debut boy Dara O'Shea says it was a "kick in the teeth" for his side to concede a sloppy goal and then for him to taste defeat on his debut as a senior international.
The former St Kevin's Boys player had been in Italy with the U-21 side, preparing for Tuesday's Euro qualifier in Pisa, when he was drafted in to bulk up a squad shorn of players by Covid-related issues, and he was given a vote of confidence by Stephen Kenny with a place in the starting line-up against Finland.
O'Shea was close to Fredrik Jensen when the German-based Finn scored the only goal of the game, an annoyance that the Irish side failed to convert their chances while the Finnish outfit scored from their best opportunity.
"It's definitely frustrating, I don't feel like we should be losing games like that and yet we didn't deserve to lose the game so it's a bit of a kick in the teeth. We created chances and they didn't go in the net," O'Shea said.
"You'll get punished at this level if you make mistakes, now we've got to pick ourselves up and continue the good work."
O'Shea says it was a mixture of Premier League exposure with West Brom this season, a spell in the senior squad last month, and his past relationship with senior boss Stephen Kenny from their time together at U-21 level which helped him bed in during a whirlwind spell in the career of the 21-year-old.
"It's been a hectic season, it's been mad to look at where I am now and where I was two or three years ago, from playing in the 17s in English football to playing in the Premier League and now the call-up to the senior Ireland team.
"It's amazing and what I dreamt of, what I has been working towards since I was a little boy. I am very proud, and to play and pull on that shirt is amazing," he added.
"I felt comfortable, it was enjoyable, I enjoyed it from start to finish. I loved it, it's been my dream since I was a kid to play for Ireland at senior level.
"I've done it now and it was amazing but the disappointing thing is the result on the night.
"I know how the gaffer works and how he wants to play. I've played before with him. I know what he expects for him.
"It makes it that bit easier for me. Having been in the last camp with the lads as well, I got to know them too. It made it that bit easier playing last night.
"It was a mad couple of days, preparing for Italy and then getting the call to fly out to meet the lads in Ireland to be potentially playing against Finland; you dream of getting that call-up and it was nice to get called in but I knew mentally if I was called on I had to give a good account of myself. That's what I tried to do, the result didn't help but I really enjoyed it."