Jack Wilshere has sustained an ankle injury that will keep him sidelined for the next three weeks, Arsenal manager Arsene Wenger confirmed Tuesday.
"Jack Wilshere is out," Wenger said. "He has an inflamed ankle, the other ankle to one he injured.
"He will be out for three weeks and will not be available for Munich, Swansea and not for England."
Arsenal plays a Champions League match vs. Bayern Munich Wednesday, followed by a Premier League clash with Swansea and England's World Cup qualifying double-header against San Marino and Montenegro.
The 21-year-old has endured an unfortunate run with injuries in recent times, missing the whole of last season with ankle and knee problems.
Wilshere has impressed since returning to first team action in October.