The 28-year-old is set to become the Gunners' record signing just five months after they set that mark to add Alexandre Lacazette
Arsenal are on the verge of signing Pierre-Emerick Aubameyang from Borussia Dortmund after the clubs agreed a £60 million fee in principle for the Gabon international.
The striker, who scored 31 league goals last season, was left out of two consecutive games for Dortmund after missing a team meeting, with head coach Peter Stoger accusing the frontman of not being focused.