Borussia Dortmund could be preparing for life without star striker Pierre-Emerick Aubameyang, as rumours emerge that the German club have already marked out a replacement.

According to Spanish outlet ​Sport , Thomas Tuchel's side are planning to offer up a hefty amount for Athletic Bilbao forward Iñaki Williams.

The young Spaniard has recently caught the eye of a number of top clubs including Liverpool and Juventus, but it is Dortmund who are reportedly ready to pay the €50m buy-out clause in his contract.

Williams has played 33 times this season and has registered five goals so far for Bilbao, as well as registering five league assists.

The 22-year-old plays mainly as an attacking right winger, but can also operate as a central striker.

Williams' impressive performances have led to a call up to the national side. The youngster played against Bosnia and Herzegovina last May, whilst he was named as back up to Vincent Del Bosque's squad who went to Euro 2016.

It appears that like Del Bosque, Thomas Tuchel believes the youngster has a big future in the game.

Dortmund could well be on the look out for an attacker this summer if Aubameyang leaves the Westfalenstadion as expected.

It is reported the Gabon striker has attracted the interest of Europe's elite sides including Real Madrid, Barcelona and Manchester City.

Dortmund are currently residing in third place in the Bundesliga. Yet, disappointingly for Tuchel's men, they are a massive 13 points behind leaders Bayern Munich

The German side also face an uphill battle to qualify for the quarter-finals of the Champions League having lost the first leg 1-0 against Benfica in Lisbon.