Werder Bremen general manager Klaus Allofs has refused to rule out the possibility of star player Diego leaving the club in the summer.
The Brazilian has consistently been tipped to leave the Weserstadion at the end of the season with Juventus the likely destination.
But fellow Bundesliga side Bayern Munich have appeared to have entered the race for the 24-year-old's signature.
The German champions are believed to be lining up a bid should their prized asset Frank Ribery depart to either Manchester United or Barcelona in the summer.
"We are Werder Bremen and we will always have to find out the circumstances of the business," Allofs told TV station Premiere.
"I cannot say we are not selling any player. Then there comes one bidding a big amount of money, but this is not just meant to be said about the future of Diego.
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"If Bayern Munich gives us a call, I will not hang up straight away.
"We have a few enquiries about Diego, not only from Juventus."
The player himself insists he is happy at Werder and states that any decision on his future is entirely up to the club.
"I am not in the position to decide my future. This is also up to the Werder Bremen," he said.
"I have a deal with the club until June 2011. I am very happy playing at Weserstadion.
"If there is anyone interested in my services he will need to talk to Werder Bremen first."