Jorginho
Former Chelsea midfielder Jorginho is the most obvious replacement for Martin Odegaard as he is one of Arsenal’s depth players in midfield. Despite playing more defensively than the Norweigan, he could step in and do a decent job.
The Italian does have a good attacking pedigree and will be able to pop up with a goal himself now and then.
However, if he were to also get injured, then Arteta’s options will begin to thin out.