Chelsea vs. Arsenal: Scoring goals was never the problem for ex-Gunner Pierre-Emerick Aubameyang

Aubameyang reunites with his former club on Sunday as Chelsea face Arsenal in the Premier League

It remains perhaps the pivotal moment of Mikel Arteta's Arsenal tenure. A moment of truly significant pain in the short term, one he believed would pay off in the months that followed.

For now at least he is vindicated. In January Arsenal paid their club captain and best goalscorer to go and play somewhere else, a decision that in retrospect might have robbed them of the three or four goals that might have swung the top four race in their favor. But when Pierre-Emerick Aubameyang reunites with his former club wearing the blue of Chelsea on Sunday there will be precious few regrets at the decision to let him go to Barcelona on Sunday.

Arsenal, top of the Premier League and 10 points clear of their London rivals, have proven a great deal about themselves already this season. Aubameyang, meanwhile, has a lot more left to show. Five games into his time at Chelsea it appeared he had hit the ground running.