Arsenal legend Martin Keown believes Bukaya Saka is better suited to filling in at left-back for Kieran Tierney, rather than understudy Nuno Tavares and Granit Xhaka.
Tierney will miss the remainder of the season with a knee injury and 22-year-old Tavares was expected to come in and deputise.
However, Tavares produced a horror show in the Gunners' 3-0 defeat to Crystal Palace on Monday night, with fans questioning his ability to provide cover.
Keown claims Arteta should look beyond Tavares and utilise Saka in the position, with the England international previously playing in the role.