ach I really dont want to see Flamini at full back and Bellerin may have looked good in pre-season friendlies but is he ready to be thrown into the deep end right now? I think it's still too early for him.
The other concern is our central defence, we have our two main guys in Per and Kos and Chambers as back up, if one of them were to get injured then forget squad rotation and resting players. I know Monreal can and has played there but he's a last resort kind of option. I just hope that Debuchy's injury is not long term so that we don't need to overplay Chambers.