Thirteen - unlucky for some. Very unlucky if you're name is Arsene Wenger.
The fixture-Gods have thrown up one of the most daunting runs imaginable for Wenger's side towards the end of October and start of November.
Beginning with a tough home game against London rivals Chelsea in the Capital One Cup, Arsenal then travel to Anfield for a table-topping clash, before jetting off to Germany to face Champions League runners up Borussia Dortmund in the Champions League.
To compound what could be a miserable 13 days, Arsenal finish the run of games with a trip to Old Trafford.
The Gunners have thus far impressed in the league and in Europe, though ignoring the fact Wenger's squad is paper-thin in certain areas would be foolish for even the most hardcore of Arsenal fans.
Should Olivier Giroud sustain an injury in the international break with France or in Arsenal's following fixtures, it would leave the Emirates side relying on Nicklas Bendtner as the clubs only out-and-out striker.
A changed man he may be, but he certainly hasn't morphed into a world class striker.
With a team lacking in title-winning experience, Arsenal will be hoping they can rely on momentum and a certain German international to see them through to a trophy come May.
Yet defeat against Chelsea - and elimination from one potential trophy - followed by defeat against their first real test in the Premier League (excluding Tottenham), and already the back pages start to turn against the Gunners.
Whilst Arsenal have thus far looked impressive in Europe, with two games against Dortmund coming up, it is a real possibility that defeat at Signal Iduna Park could see Wenger's men staring Champions League elimination down the barrel.
What better remedy than a visit to Manchester four days later? Arsenal have won just one of their last 10 visits to Old Trafford and were famously trounced 8-2 in 2011.
Of course, this could all be nonsense and Wenger's side may dazzle us all with a string of superb performances and results.
However, this wouldn't be the first time we've seen an Arsenal side dramatically collapse in recent seasons. Remember 2008 anybody?
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