Danny Welbeck will be out until at least next month's international break with a groin injury, confirmed Arsenal manager Arsene Wenger.
The England international sustained the injury during the Gunners goalless draw with Chelsea on Sunday.
Welbeck will miss Wednesday's Carabao Cup clash with Doncaster, as well as the Premier League home games against Brighton and West Brom, and the Europa League trip to BATE Borisov.
"Danny has a scan today," said Arsene Wenger. "We don't know how bad his groin injury is but he will certainly be out until the international break."