The Arsenal player from Scotland has not made an appearance for the team this season and has been given permission to find a new club.
Forgotten Arsenal defender Kieran Tierney could be in line for a Celtic return.AdvertisementAdvertisementPer talkSPORT, Celtic are monitoring his situation and may make a January move.
Many fans were surprised that Tierney did not secure an exit in the summer, given the lack of faith manager Mikel Arteta has in him.
Celtic boss Brendan Rodgers has previously spoken about Tierney in glowing terms.
Tierney has not played since suffering a serious hamstring injury at Euro 2024 in the summer.