Celtic could have made a massive mistake regarding Cameron Carter-Vickers' deal at Parkhead.

What's the talk?

That's according to a claim made by Frank McAvennie, with the former Hoops centre-forward revealing in a recent interview with Football Insider that, should the Bhoys have not agreed a fee with Tottenham regarding a clause to sign the centre-back on a permanent basis, someone at Parkhead has made a grave error.

Speaking about the potential signing of the USA international this summer, McAvennie said: "I would have thought a price would be agreed during the loan talks. If it hasn't, then someone at Celtic hasn't done their job. You can't have someone coming up, impressing, then the price goes up.

“You can't have that. So, if a price hasn't been agreed, it is a massive mistake. He's been brilliant and I would like him to stay around so, hopefully, something can be arranged. We haven't had too much news about that [in Scotland] so I can only hope it's not true."

Postecoglou would be livid

Considering just how impressive Carter-Vickers has been for Celtic since his season-long loan move to Parkhead last summer, it would indeed seem that the Bhoys transfer team have made something of a grave error if the club have not included an option to purchase the defender at a set price this summer, as had been previously reported.

Indeed, over his 25 Premiership appearances so far this season, the £2.7m-rated centre-back has been in remarkable form in the heart of Postecoglou's defence, helping his side to keep 13 clean sheets, along with averaging 1.2 interceptions, one tackle and 4.4 clearances and winning 6.1 duels per game.

The £22k-per-week colossus has also chipped in at the other end of the pitch, bagging three goals and providing his team-mates with one assist, also taking 0.6 shots and making 0.3 key passes per league match.

These returns have seen the 24-year-old average an astonishing SofaScore match rating of 7.35, ranking him as the fifth-best performer in the entire Premiership.

As such, should Celtic miss out on the permanent signing of Carter-Vickers this summer due to being priced out of a move, it is undoubtedly a scenario which would leave Postecoglou fuming, as it would be a disaster of the Hoops' own making.

AND in other news - Sold at £3m, now valued at £50m: Celtic had a shocker on "outstanding" £70k-p/w "star"