Arsenal have been urged to sell one player this summer in order to make room for Riccardo Calafiori at the Emirates Stadium. Despite having an abundance of options who can can play at left-back for Arsenal, Mikel Arteta is still keen to make an addition in this part of the pitch during the summer transfer window. Oleksandr Zinchenko, Jakub Kiwior, Jurrien Timber, and Takehiro Tomiyasu all played at left-back for the Gunners least season, whilst Kieran Tierney and Nuno Tavares both still remain on the North London club’s books. Tierney and Tavares spent last season out on loan. Arteta will now …