Arsenal lost to Dortmund this week, and must now show their mentality matches their ability.
Rewind to last season. After a stuttering start to the season, Arsenal went through a terrific September.
They won four out of five games and drew the other, scoring 17 goals in the process, with the highlight a crushing victory over Southampton.
Then it came to juddering halt. The Gunners faced what was billed as their first true test of the campaign: a home match against Chelsea. After much hype they lost 2-1, with a disappointing performance to boot.
After the match Arsene Wenger told that his team found the defeat mentally tough to take. While they won their next games against Olympiakos and West Ham, back to back defeats to Norwich and Schalke showed the feelgood bubble around the club had popped.
Now after their incredible start to the 2013/14 season, the first test of Arsenal's character has presented itself in the wake of their loss to Dortmund.
The build-up to the Champions League tie showed the match was like an event in itself, almost like a cup final. When left-back Kieran Gibbs tweeted the following day saying how 'really disappointed' he was at the loss, it seemed like the right thing to say, but you wonder how much the blow will have affected them.
Not much will be learned on Saturday when the Gunners take on a manager-less Crystal Palace, but the matches which follow are certainly testing.
They face Chelsea, Liverpool, Manchester United, and Dortmund, before an in-form Southampton come to visit.
Going into those matches Arsenal would have dearly loved to have taken a confidence inspiring win from beating Dortmund but it was not to be. Now they just need to show that they can get past this wobble and demonstrate they have a sterner make-up this time around.
Will Arsenal bounce back over the next month or are you worried?
image: © wonker