Arsenal have made a transfer offer for Pierre-Emerick Aubameyang, report German newspaper BILD.
The Gunners are reported to have submitted a bid worth €40 million - £28.4 million.
Aubameyang was Dortmund's top scorer last season, netting 16 goals in the Bundesliga, just one less than the player who left them - Robert Lewandowski - bagged for Bayern Munich.
Lewandowski was considered irreplaceable by some, but Aubameyang was able to step up. If the Gabon international was sold to the Gunners, Dortmund have the players to step up in turn, with Adrian Ramos and Ciro Immobile.
The decision will rest with Dortmund's new boss Thomas Tuchel, and his own plans - whether he values Aubameyang more highly than his current options combined with the cash to spend on a replacement.
Bundesliga expert Jan Aage Fjortoft is leaning on the side of caution, judging the striker as too important to sell, but still feels Arsenal may have luck regarding their financial offer.
Re: Aubameyang Aubameyang has done great for Dortmund and it's hard to see new boss Tuchel will let him leave the club. 2/3— Jan Aage Fjortoft (@JanAageFjortoft) June 23, 2015
Re: Aubameyang But talk of 40 mill euro can persuade them. Bought him for 13. And Dortmun NOT in the ChampionsLeague next season 3/3— Jan Aage Fjortoft (@JanAageFjortoft) June 23, 2015
The lack of Champions League football is a big factor, with Dortmund in re-building mode after a poor season.
What makes Aubameyang so tempting for Arsenal is his athleticism and pace running with and without the ball.
Regarded as one of the fastest strikers in Europe, he would form fearsome frontline at Arsenal alongside Theo Walcott and Alexis Sanchez, and offer a completely different option to the effective if often too static Olivier Giroud.