The deal set Chelsea back £12m, with Marcos Alonso heading in the opposite direction.
Aubameyang made his debut for the Blues in the Champions League last Tuesday vs Dinamo Zagreb.
Aubameyang looked sharp early on, nearly setting up several goals and coming close himself.
However, as the game wore on, both he and Chelsea faded and eventually succumbed to a 1-0 loss which led to Thomas Tuchel’s dismissal the next day.
Despite his slow start to life at Chelsea and a change in manager, Gus Poyet is backing Aubameyang to be an important player for the west Londoners in the 2022/23 season.
“I thought his first 20 minutes (against Dynamo Zagreb) were outstanding, the movements, the way he ran in behind, the timing, I thought he would score three, then Chelsea lost. Aubameyang is a top striker and will be important for Chelsea this season.”
Graham Potter must now decide who out of Aubameyang, Kai Havertz and Raheem Sterling will be his main striker going forward as all three players have taken up that role in the past.
101 have previously looked at how the trio compare when playing up front in the Premier League, and you can read about that here.
Chelsea’s next outing is expected to come vs RB Salzburg in a Champions League clash on Wednesday.
But as the game is taking place in London, there are fears it may have to be called off due to policing issues.