Borussia Dortmund coach Peter Stoeger hopes his side can delay old rivals Bayern Munich's Bundesliga title celebrations when the German giants go head-to-head at the Allianz Arena on Saturday.

Athletics legend Usain Bolt, who has ambitions to start a football career at 31, will train with Borussia Dortmund on Friday, the Bundesliga club has announced.

Borussia Dortmund CEO Hans-Joachim Watzke has threatened to clean out the current squad at the end of the season -- unless results improve.

With Borussia Dortmund having sold their self-styled "Batman" Pierre-Emerick Aubemayang, his replacement Michy Batshuayi, another aspiring "Caped Crusader", answered their call for goals on his debut.

Borussia Dortmund coach Peter Stoeger says now that the Pierre-Emerick Aubameyang transfer saga is finally over his side can refocus on their football as they prepare to face resurgent Cologne on Friday.

Pierre-Emerick Aubameyang is closing on a switch from Borussia Dortmund to Arsenal as Arsene Wenger looks to boost his forward options, reports in Germany and Britain said on Monday.

Arsene Wenger said Friday that any deal for Borussia Dortmund striker Pierre-Emerick Aubameyang was "far from close" but did not rule out further signings in the January transfer window.

Arsenal have reportedly had a first offer of 50 million euros ($61.1 million) for Pierre-Emerick Aubameyang rejected by his German club Borussia Dortmund, according to Kicker magazine on Saturday.

Borussia Dortmund insisted that Pierre-Emerick Aubameyang has a future at the club, even though he was left out of the squad for Friday's 1-1 Bundesliga draw at Hertha Berlin.

Bayern Munich coach Jupp Heynckes has backed the decision by Bundesliga rivals Borussia Dortmund to drop star striker Pierre-Emerick Aubameyang amid reports he is chasing a move to Arsenal.

Borussia Dortmund said on Thursday they have had no contact with Arsenal amidst reports their star striker Pierre-Emerick Aubameyang is chasing a move to the Premier League giants.

All eyes will be on whether Pierre-Emerick Aubameyang will return to Borussia Dortmund's starting line-up at Hertha Berlin on Friday, with the star striker reportedly chasing a move to Arsenal.