Arsenal's Ramsey ruled out for at least three weeks

Aaron Ramsey is expected to miss at least three weeks for Arsenal with a hamstring injury.

Ramsey, 24, pulled up during the first half of Arsenal's 2-0 Champions League victory over Bayern Munich at the Emirates on Tuesday night.

Ramsey underwent a scan on Thursday and Arsenal manager Arsene Wenger confirmed the Wales international will now be unavailable for selection until after the next international break.

"He had a scan today but he's out," said Wenger, in a statement released on Arsenal's website.

"I believe he will be out until after the next international break. With the [last] international break, the fact that he played against Andorra certainly cost Bale and him as well."

Wenger also revealed that goalkeeper David Ospina would miss Arsenal's Premier League game against Everton this weekend through a shoulder injury.