It's been a tough start to life at Celtic for Ange Postecoglou on and off the park.

The Australian has failed to mount a serious run of results since arriving at Parkhead, and has been faced with a lengthy list of Celtic absentees.

Before a ball was kicked in the Scottish Premiership, the boss had stressed the need for new recruits to add depth to his squad.

However, with a massive Europa League clash with Bayer Leverkusen on the horizon the lack of numbers is clear.

With the likes of Kyogo Furuhashi, James Forrest, Greg Taylor, Callum McGregor and Josip Juranovic all missing, will Postecoglou be making the case for more signings?

DRPod-Celtic.png

Get all the latest Celtic news sent straight to your Inbox every day by signing up to our newsletter.

We cover every morsel of information regarding your favourite club in the form of articles, videos and podcasts.

The newsletter will arrive every day at 12pm, giving you a round up of the best stories we've covered that in the last 24 hours.

To sign up, simply enter your email address into the link here.

And if you aren't already, make sure you join the conversation over on our Celtic Facebook group and Record Sport Instagram.

The Parkhead board have already dipped into the free agent market with James McCarthy, so could there be any other additions to ease the crisis.

Record Sport takes a look at the players who are still available.

Jack Wilshere

The England international has been dogged by injuries throughout his career, only once managing to make more than 30 league appearances.

Wilshere has been a free agent since leaving Bournemouth and had been training with Italian Serie B outfit Como, but a move collapsed due to being a non-EU player.

The 29-year-old has been frank about his future in the game, admitting he is desperate for any club to take a gamble on him this season.

In interview he has stated he has been training every day since leaving the Championship club after their playoff disappointment, but is yet to find a suitor.

Having already taken a gamble on James McCarthy as a free agent, could Postecoglou be tempted to roll the dice again to bolster his midfield ranks?

Last game: Bournemouth vs Brentford, May 17 2021

Robbie Brady

LONDON, ENGLAND - FEBRUARY 13: Robbie Brady of Burnley looks on during the Premier League match between Crystal Palace and Burnley at Selhurst Park on February 13, 2021 in London, United Kingdom. (Photo by Sebastian Frej/MB Media/Getty Images)

Ireland international Brady has long been linked with a move to Celtic Park, but nothing serious has materialised between the two parties following his departure from Burnley.

The left-sided player can play in defence or in midfield, and given the 'Angeball' philosophy of flooding wing-backs forward, Brady would seem to fit that style.

As it stands, Celtic are facing a crisis at left-back with first-choice Greg Taylor suffering from a shoulder injury.

It has left youngster Adam Montgomery and outcast Boli Bolingoli vying for the position, with right-back Josip Juranovic also swapping sides.

However, after an injury-hit spell at Turf Moor it would be another risky deal.

Last game: Qatar vs Ireland, March 30 2021

Neil Taylor

LONDON, ENGLAND - SEPTEMBER 22: Nicolas Pepe of Arsenal turns away from Neil Taylor of Villa during the Premier League match between Arsenal FC and Aston Villa at Emirates Stadium on September 22, 2019 in London, United Kingdom. (Photo by David Price/Arsenal FC via Getty Images)

Another left-back would seem like a savvy piece of business in the free agent market, and Neil Taylor ticks that box.

The former Swansea left back is still only 32 and has a wealth of experience at Championship and Premier League level.

The Wales ace has been a Premier League mainstay for both Swansea and Villa in recent years before falling out of favour more recently under former boss Dean Smith.

Despite that, the veteran has struggled to find a new club since leaving the Midlands outfit.

However, with Celtic short on options in that position could a Celtic Park chance be on the horizon for the Welshman?

Last game: Manchester City vs Aston Villa, January 20, 2021

Andy Carroll

NEWCASTLE UPON TYNE, ENGLAND - JANUARY 03: Andy Carroll of Newcastle United looks on during the Premier League match between Newcastle United and Leicester City at St. James Park on January 03, 2021 in Newcastle upon Tyne, England. The match will be played without fans, behind closed doors as a Covid-19 precaution. (Photo by Michael Regan/Getty Images)

Andy Carroll returned to boyhood club Newcastle United in 2019 but it was far from a fairytale.

The 32-year-old managed just a solitary Premier League goal during his two seasons back on Tyneside before being released this summer.

He had been on the brink of signing for Reading on deadline day, but after a deal collapsed he remains on the hunt for a contract.

The England cap would certainly offer something different to the likes of Kyogo Furuhashi and Odsonne Edouard who have starred for the Hoops so far this season.

As it stands, Albian Ajeti is the only fit striker in Glasgow's east end and a deal could benefit both parties.

Last game: Newcastle vs Sheffield United, May 19 2021

Hal Robson-Kanu

WEST BROMWICH, ENGLAND - MAY 16: Hal Robson-Kanu of West Bromwich Albion during the Premier League match between West Bromwich Albion and Liverpool at The Hawthorns on May 16, 2021 in West Bromwich, United Kingdom. (Photo by James Williamson - AMA/West Bromwich Albion FC via Getty Images)

The Wales international would offer another dimension to the Celtic attack with the squad threadbare.

At 32, he could be worth a punt having seen out his contract with Premier League West Brom.

He hasn't been a regular scorer since the Baggies promotion season in 2019/20 where he scored 10 goals.

With that said , he can be physical, direct and doesn't shirk the ugly side of the game. That sounds like a perfect mix for the Scottish Premiership.

Last game: Leeds vs West Brom, May 23 2021

Daniel Sturridge

Another that can be filed into the 'risky' category would be is Daniel Sturridge, but there aren't many other two-time Champions League winners on the list.

There has been a major career nosedive for the former Chelsea and Liverpool striker since leaving Anfield.

During a spectacular campaign in 2013/14, he first 21 Premier League goals for the Reds, but injuries derailed his time at the club.

Sturridge was released by Liverpool back in 2019 and signed for Turkish outfit Trabonzspor on a three-year deal.

That was terminated early back in March 2020, on the same day he received a four-month ban from football for betting offenses.

He is yet to find a new home.

Last game: Besiktas vs Tabzonspor, Ferbuary 22 2020

Jozo Simunovic

It will surprise many Celtic fans that Jozo Simunovic is still looking for a club.

Despite being hampered by injuries, the Croat always looks like he could take the next step in his career at one stage.

However, having been released at the end of the 2019/20 season he is yet to find a new club.

The centre-back has a history of knee problems and has seen switches to Rijeka, Trabzonspor and Goztepe fall through but he's now wanted by Bundesliga outfits Stuttgart and Augsburg.

Could a short-term return for the 27-year-old solve the issues at the back that have hampered the campaign so far?

Last game: Celtic vs FC Copenhagen, February 27 2020