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Pierre-Emerick Aubameyang
Pierre-Emerick Aubameyang celebrates his brace as Borussia Dortmund rally to beat Ingolstadt at Signal Iduna ParkAFP

Speculation regarding the future of Borussia Dortmund striker Pierre-Emerick Aubameyang is likely to increase at the end of the season, with chief executive Hans-Joachim Watzke reiterating his desire to keep the player but also admitting that substantial offers will need to be discussed. The Gabon international has emerged as one of European football's most in-form strikers in 2015-16, leading Bayern Munich counterpart Robert Lewandowski at the top of the Bundesliga scoring charts with 20 goals in just 19 appearances.

Aubameyang netted twice in the last 13 minutes on 30 January as Thomas Tuchel's side, missing the likes of Marco Reus, Ilkay Gundogan and Marcel Schmelzer due to a virus, temporarily narrowed the gap on leaders Bayern to just five points with a 2-0 victory at home to mid-table Ingolstadt. Such excellent form has obviously not gone unnoticed, with The Mail suggesting Arsenal were interested in signing the reigning African footballer of the year who is believed to be valued at £60m ($86.2m).

While there is no absolutely no chance of a move in the final hours of a relatively quiet January transfer window, it remains to be seen if Dortmund are capable of retaining the 26-year-old's services beyond the summer. The potential fees mooted for Aubameyang have been understandably huge given that he is currently under contract until 2020 and while Watzke is eager to fend off any interest, he admits that offers in excess of €100m will merit consideration.

"If an offer comes, then we need to discuss it. If it should go into the hundreds of millions, then we also need to talk to the player," he told Sky as quoted by FourFourTwo. "But I'm not worrying about it because at the moment we want to keep him as long as possible, best beyond 2020."

Aubameyang, who initially joined Dortmund from Saint-Etienne back in July 2013, has already been quick to rubbish any rumours suggesting that he was set for an imminent switch away from the Bundesliga.

Speaking to Bild in January, he said: "I still want to achieve lots with Dortmund. I am here and nowhere else - not at Arsenal, not at Barcelona, not on the moon - you can see that."