Kieran Tierney is poised to make his first Arsenal appearance in over 16 months during Wednesday’s Champions League clash against Monaco. Manager Mikel Arteta confirmed Tierney’s inclusion, necessitated by a spate of injuries in Arsenal’s defensive ranks. Thomas Partey, Jurriën Timber, Oleksandr Zinchenko, and Gabriel Magalhães all missed training on Tuesday, leaving their availability doubtful…