Henrikh Mkhitaryan and Mesut Ozil both put themselves in contention to start the derby with stellar performances and a goal apiece in the fine win over Bournemouth, but Emery would not be drawn on whether either had done enough to play their way into his plans for Saturday's game.
"We are thinking step by step, game by game and today we finished happy but we are preparing again for the game on Wednesday [against Bournemouth]", he said. "Today with our supporters here, we had a good atmosphere", Emery told the BBC.
The Gunners manager made six changes to the team which beat BATE Borisov in the Europa League on Thursday, with Pierre-Emerick Aubameyang and Mesut Ozil dropping to the bench.
"He helped us with his quality and his work also to organise and play in different systems".
The visitors brought on Michael Obafemi, who had only just returned from injury, but within 20 minutes he came off with a knock to his ankle. "I hope he'll be okay for Wednesday". After 2-0 their goal can give us a problem but I think we show maturity in this moment by continuing to push.
Ralph Hasenhuttl has already prioritised matches since he took over in the Saints hot seat and it could be that he did exactly that on Sunday, in which case he may not be too disappointed with the display in a game where the Hampshire outfit were done for inside the first 17 minutes.
"Of course, it's a very big game".
"At home we are feeling strong, but away we need to be more consistent", Emery said. "For us this win, and the way we played, is a positive", he added.