Injuries have been one of the main issues Celtic have dealt with this season. And unfortunately, things do not seem to be getting any easier for the Hoops on that front.

Mika Baur appeared to pick up a knock towards the end of the game against Kilmarnock on a day he was one of the best players on the pitch.

With Celtic's midfield continuing to underperform, Baur has emerged as a very important player for the Hoops since his summer arrival.

Unfortunately, though, fears are now growing that he could be set for a spell on the sidelines due to the knock.

It was recently announced that Baur was unavailable for German U21 duty during this international break, although the reason behind it was not given.

Now, the DFB have confirmed to CeltsAreHere that Baur is missing because of a foot injury.

Obviously, that is official confirmation of the injury and its nature. The extent of the issue remains unknown but it was clearly serious enough for him to miss international duty.

Baur was expected to undergo a scan following the game against Kilmarnock. The fact that the extent of the matter has not been confirmed by the club or leaked to the media since then will only add to the supporters' worries about the situation.

If Baur has picked up any sort of extensive injury, that will be a huge problem for a Celtic side whose midfield is not in the best shape right now.

In the absence of Baur, one would imagine that Martin O'Neill would rely on the experienced figure of Alex Oxlade-Chamberlain. But his combination with Callum McGregor and Benjamin Nygren has not looked the most balanced when they have played together in the past.

Luke McCowan could be another option but the midfielder simply has not looked good enough to be a starter for Celtic over his time at Parkhead.

Then there are the two summer signings, Oliver Sorensen and Joel van den Berg. The former has not convinced so far. The latter has not even made his debut.

So, it goes without saying that the situation is far from ideal for Celtic. The best-case scenario would be if Baur has managed to avoid any sort of long-term issue and is back available after the international break. But the longer there is silence around the extent of the injury, the greater the chances that he will be out for a while.