FOR Celtic fans, there is no doubt their main interests will lie on incomings at Parkhead this January. 

Ange Postecoglou has already moved quickly to strengthen his squad this winter. 

Daizen Maeda, Reo Hatate and Yosuke Ideguchi all signed at the beginning of the month, with the club announcing the Japanese trio on Hogmanay. 

It remains to be seen what other business will be done by Postecoglou in terms of adding to his squad. 

However, talks are said to have opened with Tottenham and Benfica over permanent moves for Cameron Carter-Vickers and Jota. 

And there are strong reports that a swoop for Hibs star Martin Boyle may still be on the cards. 

All of this means that, naturally, there will need to be some players moving in the other direction. 

Here are five outgoings who could potentially exit Celtic Park before the end of the window.

Albian Ajeti

HeraldScotland:

Celtic look top heavy now after the addition of Maeda from the J-League. 

An obvious option to balance the squad would be to try an offload former West Ham forward Ajeti. 

The striker arrived for a sizeable fee of £4.5million in 2020.

It's fair to say the Swiss has been a big disappointment since his arrival. 

This season, he has just three goals from 17 appearances. 

He is certainly behind Kyogo in the food chain, and with Posteoclgou signing both Giorgos Giakoumakis and Maeda, you'd have to assume he is also behind those two front men as well.

Owen Moffat's emergence from the academy and performances in the B-team have sparked hope that the 20-year-old is capable of getting first team minutes at Celtic Park. 

So it seems logical for all parties that Ajeti moves on to pastures new to revive his career and for the club to cut their losses.

Vasilis Barkas

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The Greek goalie may have played in the last match against St Johnstone, but it's clear he is very much out of favour at Parkhead.

Unfortunately for the club, he must go down as another expensive failure. 

Neil Lennon signed the keeper for £5million from AEK Athens. 

But high-profile mistake after mistake, the 27-year-old has clearly not settled well to life in Glasgow, with his reputation taking a massive hit. 

Joe Hart was signed by Postecoglou during the summer, with the ex-Manchester City hero very much No.1. 

Scott Bain more often than not is on the bench as the back-up option. 

This leaves Barkas and young goalie Conor Hazard as the picks for third choice. 

Taking into account the fee involved for the former, and the high wages he is likely to be earning, it would be no shock to see Celtic sell Barkas. 

There has to be a buying club though. It remains to be seen if there are any suitors for the players. 

Osaze Urhoghide

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Signed from Sheffield Wednesday before Postecoglou entered the Parkhead hotseat, the young defender has made just one appearance under the Aussie. 

It was an impressive showing all the same, winning 100 per cent of his headers and 60 per cent of his tackles against Real Betis in a Europa League dead rubber. 

However, the 21-year-old has seemingly struggled to adapt to the manager's style of play and intense training. 

An example of the youngster being out of favour as things stand is the fact that 18-year-old Dane Murray has played more first team minutes. 

Liam Shaw - who also arrived from the Owls last summer - has joined Motherwell on loan this month. 

Urhoghide looks likely to follow his pal out of the door for a loan too.

Adam Montgomery 

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Most definitely the biggest surprise on this list, the 19-year-old has made a good impression any time he's featured for the Hoops. 

He has made 18 appearances for the club, with seven of those coming from the start. 

Montgomery is usually deployed at left-back, however, can be used further forward in the left-wing position - which Postecoglou has opted to use him in on a few occasions. 

He is clearly an upcoming defender though, with the stats proving he has won 54 per cent of his tackles from the games he's played. He has also won just under half of his heading duels. 

Greg Taylor has just returned from injury and looks to be the club's first choice left-back currently. 

Liam Scales has also slowly but surely crept into the first team picture after his summer move from Ireland. 

The aforementioned Hatate can play in several positions as a bit of a utility man. But left-back appears to be one he can comfortably cover. 

This is before you consider Josip Juranovic's ability to play in either full-back role too.

Contracted until 2025, we are in no way suggesting the versatile left-footer will not have a future at Parkhead. 

However, for the reasons above, a loan move to gain regular first team minutes seems to be a sensible option for the remainder of the campaign.

Boli Bolingoli

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He arrived from Rapid Vienna in 2019 for around £3million under Lennon. 

The Belgian was the first choice left-back for the first half of the 19/20 Covid curtailed season, putting in some fairly decent performances. 
However, Taylor shortly after took the starting berth from the left-back - and Bolingoli has been pretty much nowhere since. 

A trip to Spain in the midst of the Covid pandemic under the noses of Celtic certainly didn't help. 

Ange has picked him twice so far this season, but it did strike as a move out of necessity rather than choice due to injuries. 

Istanbul Basaksehir took the player on loan last season, and the defender even featured against Manchester United in the Champions League. 

There's absolutely no doubt Bolingoli will leave Celtic for good in the near future. The club will just hope they can recoup even some of the money they paid for him around two-and-a-half years ago.