Josh Doig could become the next Kieran Tierney and Celtic would be wise to sign him up.

That's the view of Charlie Nicholas who is a big fan of the Hibs left-back.

Doig burst onto the scene this season by picking up the Scottish Football Writers Association young player of the year after a brilliant season where his side finished third in the Premiership.

Celts, meanwhile, need a new left-sided defender after Diego Laxalt headed back to parent club AC Milan following his loan spell at Parkhead.

And Nicholas believes Doig would be the perfect signing and that his former club would be making a wise investment spending around £4million on the promising starlet. "If I was Ange Postecoglou I would be trying to sign Josh Doig because he could become the next Kieran Tierney," he wrote in his Daily Express column.

"There is talk that Watford have just had a bid of £2.5million knocked back. Why wouldn't Celtic go into the market and try and sign him from Hibs? They might even be able to trade in one or two players to perhaps seal the deal. I think Doig has great potential and could flourish into a real Tierney type.

"If it was to take £3m or £4m, then why not pay it? He would have a future sell-on and is one of the best young players in the country.

"I know a left-back might not be a priority but I would still go after him right now."

Nicholas admits that left-back may not be the Hoops' top priority right now with other positions needing filled. The likes of a new goalkeeper, he says, must be signed and he put forward a handful of names Postecoglou could potentially consider.

"Celtic need a new number one because Vasilis Barkas is not the answer," he added. "Also, if I were Celtic I wouldn't be looking to spend a lot of money on another keeper. I think they could solve this position with a good loan and relatively cheaply.

"I would suggest Danny Ward, who did well for Wales at Euro 2020. He is not getting regular football at Leicester City and has shown internationally he is a reliable and solid keeper. Ward also proved himself at Aberdeen, when he came up on loan in a season where the Dons challenged Celtic up until he returned to his then-parent club Liverpool that January.

"Caoimhin Kelleher has already played in the Liverpool first team, he is another one. My mate Phil Thompson rates him highly and he's another who wouldn't be overly expensive.

"Right-back is a position of immediate concern. Jonjoe Kenny came up on loan but he wasn't really a standout.

"Postecoglou needs to fill that and I would be tempted to go for somebody like Danny McNamara at Millwall. He has already had a spell up here at St Johnstone and done really well.

"He is playing at Millwall but he is young, has potential and I would also expect him to quickly break into the full Republic of Ireland squad.

"The central defence is another area, although it looks like Celtic are about to sign MarioVuskovic from Hajduk Split. I still think they need another striker, even if they re-sign Leigh Griffiths and continue with Albian Ajeti. I believe they still need another one, especially if Odsonne Edouard goes.

"I would try and get Eddie Nketiah from my old club Arsenal.

"He has been linked with West Ham United and teams in the Bundesliga and he is a really quick and exciting talent.

"He had a spell on loan at Leeds cut short because of injury but he is back fit and he is one I would look at either on a loan or a permanent contract, if that could be done."