Arsenal manager Arsene Wenger has confirmed Danny Welbeck sustained a groin injury during the Gunners 0-0 draw with Chelsea.
The Englishman was substituted for Olivier Giroud after 73 minutes.
"He has a groin problem," Wenger told the club's website.
"I don't know how severe it is but it looks like a 'good' groin problem, not an easy one."