Two of Celtic’s brightest stars this season have been John Guidetti and Jason Denayer.
Unfortunately for the reigning Scottish champions, neither is technically their player.
Both are due to spend the season on loan at Parkhead from Premier League heavyweights Manchester City, with Manuel Pellegrini eager for the pair to get competitive minutes under their respective belts.
They have found those opportunities in Glasgow, with Denayer earning senior international recognition with Belgium.
The concern for Celtic is that they are likely to find themselves without the duo at some stage in the near future.
Guidetti is said to be attracting interest from England, while there is little chance of City agreeing to sanction a permanent deal for Denayer.
Ex-Hoops striker Andy Walker believes his former employers are causing themselves problems with their transfer policy, with it possible that another summer of change in 2015 will cost them a lucrative spot in the group stages of the Champions League.
He told Sky Sports News: “I think the worrying aspect in regard to Celtic, the way that Ronny Deila has gone about his business, is that – even now before the turn of the year and forgetting the Rangers game on the horizon – I think the biggest game in the near future for Celtic is the Champions League qualifiers. They are going to win the domestic title, of that there is no doubt, but when you have got so many players in your first XI who are on loan, there is a real danger there that the manager might lose those players and have to build a team really quickly.
“The top scorer now at Celtic is Guidetti, on loan from Manchester City. He’s scoring a lot of goals and maybe that is attracting a bit of interest from the Premier League teams in England. You have got (Jason) Denayer at the back, who they have high hopes for and is from Manchester City again, and (Jo Inge) Berget who may be going back to Cardiff, we don’t know. But they have got too many players on loan.”
Celtic are certainly well on course to defend their domestic crown, with seven straight wins opening up a three-point lead over Inverness Caledonian Thistle.
Efforts do tend to revolve around the Champions League qualifiers, though, with Deila’s men having failed to progress this season to end up in the Europa League.
It is easy to suggest that they should have worked harder last summer to land players on a full-time basis, but that is not always easy and managers would prefer to make quality additions regardless of the terms on offer.