WHAT HAPPENED? The Gabon international only moved to Camp Nou in January, after being frozen out at Emirates Stadium, but he has returned to London on a two-year contract. His latest transfer agreement sees Marcos Alonso move in the opposite direction to Catalunya. THE BIGGER PICTURE: While he has filled a wide attacking role on a regular basis across his career to date, Thomas Tuchel will be hoping that Aubameyang - who he has worked with before at Dortmund - can become the central striker they are crying out for. He previously hit 92 goals through 163 appearances for Arsenal. IN THREE PHOTOS: WHAT NEXT FOR AUBAMEYANG: As a proven Premier League performer, the 33-year-old will want to hit the ground running at Chelsea – with the Blues next in action against West Ham on Saturday.
