Arsenal are looking to take themselves back into the top four and will go level on points with Chelsea if they win today.
Barring a freak result, the Emirates outfit will stay fifth on goal difference but with Manchester United finding their mojo, a win is necessary.
But Emery is reeling after a hectic festive schedule has left his squad depleted.
Arsenal have been hit with many injury problems in recent times, with his defence looking threadbare in particular.
Rob Holding has been ruled out for the season while Shkodran Mustafi and Konstantinos Mavropanos have only just returned to training.
But Emery is reluctant to throw Koscielny into the starting line-up because of the fixture pile-up.
The 33-year-old has only returned recently himself from an Achilles injury that had ruled him out for seven months.
The Frenchman played against Blackpool in Fulham, two results that were comfortably won.
But the Telegraph report that Emery is not keen on the idea of rushing him back after such little rehabilitation time.
“He is training well and he is OK,” Emery said.
“We pushed him to play after his injuries because we needed him in some matches. It’s not easy for him to play three matches in one week.
“We pushed him and he was playing three matches during the week, but not ninety minutes each match.
“Little by little Koscielny is feeling better and he can play consistently in the next matches.
“Now, this week is perfect for everybody. We can use the players in the match on Saturday after a week of rest. The players have been recovering for this match.”