Looking at football.london's transcript of the post-match interview cuz arsenal.com doesn't have it yet; Arteta said that "we have 30 players here which is unsustainable." Who would you guys want sold? Transfermarkt lists 33, not 30, so I assume he's rounding off lol.
For me (in no particular order): Cedric, Runarsson, Pepe, Trusty, Elneny (probably not sold but turned into a coach ideally but I'm sure he's not ready to retire), one of Balogun/Nketiah, plus loans for Marquinhos, Tavares, and Sambi.