Arsenal are set for a busy summer both in terms of signings as well as sales, and there is little time left in the season for some players to prove their worth. Mikel Arteta’s lack of rotation this season has been questionable, and there is perhaps a level of distrust between him and the backup players available to him. Arsenal’s Champions League defeat to Bayern Munich saw several big names left as unused substitutes, and their futures could all be under question ahead of the summer transfer window. Arteta may look to cash in on some of his squad players to make room for potential upgrades, a…