Five Things We Learned: Arsenal 0-1 Chelsea

Arsenal were left empty handed once again by Chelsea, as the Blues of London took away all three points from the Gunners in their own home.

An early sending off for the north London side once again made it a lot harder than it should, and probably would have been, but a goal almost instantly after from Diego Costa put Chelsea ahead, and from then on Arsenal were chasing the game.

What can we learn from the 1-0 loss?