Hector Bellerin also suffered an injury which rule rule him out for a "few weeks" and with Sokratis Papastathopoulos, Sead Kolasinac and Shkodran Mustafi back in contention Emery was cautious about adding to his squad next month.
"We were talking with players and it would be fantastic", he said.
The Carabao Cup tie may not carry the same weight with supporters as a league derby, but Emery said he will field as strong a team as possible, even though Arsenal are struggling with injuries going into the busy holiday fixture period.
"It's not a good result but this reality gives us more motivation to continue to work hard, find a new thing to work on each day, and also it makes us demand a lot from ourselves". "Tomorrow I think is a very good match for the supporters, very big match for the players and a very big match for us, the coaches, also".
He watched Southampton lose 1-0 at Cardiff in his first match and, in a PR stunt this week, he sent free drinks vouchers to Saints season-ticket holders.
Arsenal lost their invincibility after 22 games as they were narrowly defeated by Southampton in an enthralling 5-goal encounter.
Arsenal twice fought back from behind at St Mary's and were seemingly on course for a hard-fought draw before a late Charlie Austin header sank the Gunners to deny Emery a point. It's not easy. Of course we are in a project that is completely different. "We need to continue improving details, because three times we conceded chances". That's the reality. They are doing this season their way in the Premier League and Champions League very consistently.
Southampton went ahead again, however, before the interval, with Redmond supplying the chance with a neat chip and once again Ings eluding his marker to score.
"Southampton deserve credit. They had a game plan and they stuck to it, but it's disappointing by us".
And as he lauded his talents, he boldly predicted his team were about to do something special yet again, while other fans mocked his claim. "I'm so focused in trying to deliver my best in this football club".
"Sadly, no punters backed this, but quite a few did back them for the top four, which is a lot more likely now than it was back in August", he said.