Celtic have a lack of depth at left-back due to Greg Taylor being the only occupier of the position with any level of quantifiable senior experience. The Scotland international has been a stalwart since arriving from Kilmarnock in 2019, registering eight goals and 25 assists in 173 appearances across all competitions [Transfermarkt]. Taylor only has a year left on his deal at Celtic, prompting talk among supporters regarding a potential contract extension for the 26-year-old. In any case, that should be a priority for the club amid the reality that Alexandro Bernabei isn’t viewed as part of th…