Aberdeen manager Derek McInnes admits his side's defence is a bit of a worry.
The Dons were beaten 3-2 by Third Division club Peterhead in a pre-season friendly at Balmoor on Wednesday night and the manner in which they conceded their goals concerned McInnes.
"Even although it was a friendly game and we give the players plenty of warning about how they are coming up against a determined team, they did not take notice of those warnings," he told the club's official website.
"I thought there was a lack of resilience and determination for the three goals we conceded. There was a determination from their boys and credit to Jordon Brown who was excellent throughout. We also did not deal with Rory McAllister in the first half.
"We had a few injuries so we had to reshuffle things and I feel we were a lot better in the second half. I thought we played well and showed more determination but when you give three goals away you are always going to be up against it. It is a worry for me."