Celtic have been dealt a big blow in their bid to bring Callum Styles to Parkhead in the January transfer window.

What's the talk?

That's according to a report by the Daily Record, who claimed that Barnsley look set to play hardball regarding the sale of the 21-year-old this month, as Poya Asbaghi recently revealed that he is not willing to let any of his first-team regulars leave the club midway through the season.

Speaking about his plans for the January market, the Barnsley boss said: "In the end, we want to make room in the squad and it's better to let go of players who aren't playing - not players who are playing. I will not go too deep into specifics on positions but I can say maybe left-back is not our biggest concern."

The Daily Record went on to suggest that this update will come as a blow to Ange Postecoglou and his Celtic side, as the 56-year-old Bhoys boss is believed to have identified the versatile left-footer as one of his primary targets this month in a bid to solve the troublesome left-back spot in his Hoops side.

Postecoglou will be livid

Considering just how impressive Styles has been for Barnsley this season, in addition to how well suited he seems to Postecoglou's particular brand of football, the news that the Yorkshire club look set to put up a fight for the 21-year-old this month is sure to have left the Celtic manager livid.

Indeed, over his 22 league outings in the current campaign, the £2.7m-rated man - who has often been deployed in a more advanced position on the left flank this season, as well as in central midfield - has scored one goal, registered one assist and created three big chances for his teammates.

The £3.4k-per-week 21-year-old has also averaged 1.3 interceptions, 2.3 tackles and one key pass and won 4.6 duels per game. These returns have seen the player who Cauley Woodrow dubbed a "massive talent" average a SofaScore match rating of 6.77, ranking him as Barnsley's eighth-best performer in the Championship.

As such, due to his attacking inclination, positional versatility and extremely high potential, it is clear to see why Postecoglou would be interested in a move for Styles this month.

However, following the latest update concerning the youngster's future, it would appear as if a move for the Barnsley starlet may be rather tricky to pull off for Celtic this month, something which will undoubtedly come as a big blow to the Hoops manager and his side.

In other news: Postecoglou heading for Celtic disaster with "superb" £1.35m-rated beast as Anthony Joseph confirms bid