With Celtic currently on a run of eight consecutive games without suffering defeat, it is undeniable that things are looking on the up under the leadership of Ange Postecoglou at Parkhead.

Indeed, almost all of the 56-year-old's summer signings have settled into the squad perfectly, with the likes of Kyogo Furuhashi - 13 goals and three assists in 18 fixtures - and Jota - six goals and six assists in 14 games - particularly impressing for the Hoops.

However, there is nevertheless a long way to go in Celtic's rebuild, with Postecoglou himself admitting that January will once again be a busy period at Parkhead.

And, with left-back being the position that has provided the Greek-Australian manager with arguably his biggest headache of the season so far, it would be incredibly surprising if Postecoglou did not bring in a fresh face on the left-hand side of his defence this winter.

Indeed, the Bhoys have already been linked with a host of players in the position, although out of all the targets mentioned, there would appear to be one stand-out candidate - that of Derby County's Lee Buchanan.

Big coup for Celtic

It is easy to see why Alan Nixon reported for The Sun that Postecoglou believes the 20-year-old could be the answer to his left-back woes, as the England U21 international is undoubtedly a player who boasts an incredible amount of potential.

Despite his tender age, Buchanan has already made 59 first-team appearances for the Rams, consistently turning in very respectable performances despite his side's struggles.

Indeed, over his 35 Championship appearances last season, the £2.25m-rated man helped his side keep seven clean sheets, registered three assists and created four big chances for his teammates, as well as making an average of 0.9 interceptions, 1.6 tackles, 2.3 clearances and winning 6.1 duels per game.

Furthermore, Wayne Rooney is clearly a huge fan of the young defender, with the 36-year-old claiming: "He's a top, top player. I'd argue he's one of the best young left-backs in the country. And he can go to another level as well. He's a real top player."

As such, it would indeed appear highly advisable for Postecoglou to make a move for the man who Rooney also dubbed an "incredible" talent this winter, as not only would the £5k-per-week 20-year-old be a big coup for Celtic given his stock in England, he could well go on to transform the club's issues at left-back for many seasons to come.

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