Werder Bremen general manager Klaus Allofs insists there have been no "concrete bids" for playmaker Mesut Ozil.

Ozil has sprung to prominence at the FIFA World Cup™ with a string of fine performances which have helped propel Germany past England and Argentina and into a semi-final with Spain tomorrow night.

The 21-year-old has under a year remaining on his existing contract, making him an obvious target for Europe's biggest clubs.

Allofs, however, is adamant Werder's star man is not a certainty to leave the club this summer.

"Now he is playing a fantastic World Cup campaign, there is definitely increasing interest," Allofs told Bild.

"But when it comes down to concrete bids, nothing has been done. We want him to stay on and actually there is no news.

"There are no indications he does not want to see out his contract at our club."

Werder will enter the Champions League at the qualifying stage in a few weeks' time and Allofs realises the club need their big-hitters to perform if they are to reach the lucrative group phase.

He added: "We need to have success on the field, especially in Champions League qualification. For this we need to have a good team."