A superb performance at the Emirates Stadium saw Arsenal beat Bayern Munich 2-0 on Tuesday evening, but it wasn’t quite a perfect game.

With the score still 0-0, the Gunners lost midfielder Aaron Ramsey to injury midway through the second half as he pulled up. It was a tense evening in the Champions League and Ramsey had a lot of work to do off the ball, it eventually took a toll.

Clutching his hamstring, Ramsey was replaced by Alex-Oxlade Chamberlain.

A standard muscle pull usually sees a player out for three weeks, meaning Ramsey would miss the return fixture at the Allianz Arena in a fortnight. In the Premier League, Arsenal face Everton and Swansea City before the end of October.

On the 8th November – 19 days from now – Arsenal host Spurs for a north London derby. Ramsey probably won’t make that game, but should return two weeks later after an international break.

The Welshman is invaluable to Wenger’s side, but his absence is likely to give a huge opportunity to Alex Oxlade-Chamberlain, who has started just one Premier League game so far this season.

Two men who could have replaced the Welshman – Jack Wilshere and Danny Welbeck – are still out, leaving Arsenal a bit thin in wide areas.