Chelsea's season has been great so far, but one overarching issue in the squad continues to cause them problems. Despite spending big over the summer, the Blues' attacking threat has thus far been limited to just their attacking midfielders, with neither Alvaro Morata or Olivier Giroud able to pose much of a threat going forward.

That has quickly become the key difference between them and their other title challengers. Whilst Chelsea lack a potent forward, the likes of Man City, Arsenal and Man Utd all possess sheer firepower that has already won them points this season.

On Monday, it was the turn of Arsenal forward Pierre-Emerick Aubaemyang to prove his worth, and in doing so, Chelsea have once again been taught a lesson.

Arsenal had a problem going forward, with their attackers struggling to score. So, they signed Pierre-Emerick Aubameyang to solve that issue; and he's now doing exactly that.

It wasn't just that they brought in a forward, though. It's the fact that they brought in two. They signed Alexandre Lacazette just a few months before Aubameyang. They recognised the importance of adding to their attacking quartet even after spending big previously; and that's now paying dividends.

The point being that for Chelsea, signing Olivier Giroud wasn't enough. They added to their struggling attack, but they didn't seek perfection quite like Arsenal did - and they're now paying the price. It doesn't get more important than signing a star forward, and Chelsea are subsequently struggling after not doing that.

Arsenal have moved quickly to fix their problems, and within just a few months, they've gone from Europa League strugglers to genuine top-four contenders.

Chelsea would be wise to do the same.

Thoughts?