Celtic goalkeeper Craig Gordon has told The Scottish Sun that there is a 'transition' in defence as the Bhoys cope without three star players.
Ronny Deila's men slumped to a shock 2-1 defeat away at Aberdeen on Saturday, which is something of a blow considering that many believe Derek McInnes' Dons will be Celtic's main title challengers this season.
The most concerning aspect for Celtic is that defensively, they have been found wanting too many times already this season - but it's little surprise.
Celtic lost last season's star loanee Jason Denayer as he returned to Manchester City, before right back Adam Matthews was sold to Sunderland.
Then, on deadline day, Celtic also sold centre back Virgil van Dijk to Southampton, meaning three regular players from the Celtic defence had been lost to the Premier League.
The Celtic defence are now trying to adjust and form a solid unit, but it's not going well so far - and goalkeeper Gordon has tried to play down any fears amongst supporters.
Speaking to The Scottish Sun, Gordon says that Celtic need time to adjust to life without their former defensive stars, and this week's Europa League clash against Ajax is the perfect time to show what the Celtic defence can do.
"We’ve lost Virgil, as well as Jason and Adam from last year," said Gordon. "There will be a transition in defence and it will take time. There’s a few changes, but we’ll settle on a back four at training in the coming weeks and we’ll get to know each other."
"We’ve brought in good quality players so hopefully it won’t take too long. We have big games coming up in the league and in Europe, so we need to bed in as soon as possible, and I’m sure we’ll do a lot of work on it in the next few weeks," he added.
New signing Dedryck Boyata has yet to hit the ground running, whilst deadline day signing Jozo Simunovic may come in to the side to face Ajax - and much will be on the Croatian to help solidify the Celtic defence.