Concerned Gordon Strachan believes Celtic have taken a huge risk with their slow transfer window business.
The Parkhead club have added Liel Abada and Kyogo Furuhashi so far this summer as part of Ange Postecoglou 's rebuild.
However, in the Champions League qualifier Midtjylland the limited pool of players was on display with academy graduates rounding out the team.
They also added wantaway Odsonne Edouard to the side, and Leigh Griffiths was added to the bench despite his off-field issues.
Celtic Park mainstay Kris Ajer is also on the brink of completing his move to English Premier League side Brentford.
Greek Australian Postecoglou has admitted that the club "hesitated" in the window so far with a massive rebuild required to push Rangers for the title next term.
Former Parkhead boss Strachan agrees insisting Celtic have rolled the dice ahead of the new Premiership season.
Speaking to Betfair, Strachan said: "There’s indecision in the transfer market and a couple of players would like to move on: Odsonne Edouard and Kristoffer Ajer.
"They were short at centre-back anyway, so they’ll have to work on that.
"They’ll probably lose Edouard - he may move on. Leigh Griffiths looks like he’s counted himself out for the foreseeable future, so there’s a big rebuilding job at Celtic in terms of players.
“They need centre-halves, right-backs and strikers – not easy to get, especially when you see strikers going for £30m and £40m in England who fail quite badly at that level.
"Celtic haven’t got that money so it has to be a bit of a gamble with the wage structure. There’s a lot of work to do with recruitment, that’s for sure.”
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