Theo Walcott is expected to miss a second successive match for Arsenal with a minor calf problem.
However, Shkodran Mustafi is available following a hamstring injury, while Danny Welbeck is getting closer to a return after a long-term knee problem.
Crystal Palace will be without defender Damien Delaney as he is serving a one-match suspension.
Manager Sam Allardyce says James McArthur, Joe Ledley and James Tomkins have an outside chance of being fit.
MOTD COMMENTATOR'S NOTES
Jonathan Pearce: "If Arsenal are to overhaul Chelsea in the title race, they'll realistically need to go to Stamford Bridge on 4 February on the back of six straight wins.