The defender has revealed he will consider his options at the end of the season and his current employers won't rule out his departure.

Borussia Dortmund has admitted it will consider any bids made for captain Mats Hummels this summer.

The 26-year-old says he will evaluate his future at the end of the season before deciding whether or not to move on.

Manchester United has long been linked with a move for the center back and when quizzed on his future, Dortmund's CEO Hans-Joachim Watzke refused to rule out his exit.

"In this moment, this a total dummy discussion, because there is no offer. If one arrives, we will discuss it internally and make a decision. But this decision will only be taken by BVB."

Watzke is not panicking, saying: "The situation at Dortmund is like this: We've lost one major player each year, but we don't stop playing football.

"To be clear: Mats knows his contractual situation, he described it in that interview himself. The decision where Mats will play next season will only be taken by BVB."

Dortmund allowed Robert Lewandowski to run down his contract before he moved on to Bayern Munich and a similar situation could arise with Hummels.

The Germany international's current deal doesn't expire until June 2017 and Watzke added the Bundesliga side doesn't need to sell to raise money.

"If we had sold Robert, we maybe would have gotten 25 million Euros. But we kept him and got €50 million more. This is the same issue here," Watzke said. "We're not thinking on the short-term. You only do that if you need money and that is not the case with us."