Arsenal manager Arsene Wenger has said Theo Walcott and Alex Oxlade-Chamberlain are out until after the forthcoming international break.
Both England internationals went off in the opening 20 minutes of Tuesday's 3-0 Capital One Cup fourth-round loss at Sheffield Wednesday.
Oxlade-Chamberlain was replaced after five minutes due to a hamstring problem and, Walcott, who came on in his place, went off after 18 minutes with a calf problem.
Wenger is still waiting for scans to determine the full extent of the injuries, but neither will feature for the Gunners in the next three games -- against Swansea, Bayern Munich and Tottenham -- or for England in November's international break.
The Frenchman told the club's official website on Thursday: "Nothing has changed since after the game.
"They are out but the scans are today -- it's 48 hours afterwards. We hope they are light injuries, but they are out until after the international break."
Wenger added that Aaron Ramsey, David Ospina and Mikel Arteta remain sidelined until after the international break.