German international Torsten Frings' luckless run of knee injuries continued on Tuesday when the Werder Bremen midfielder was ruled out for another six weeks after a further set back.

The 31-year-old has missed most of this season after a pre-season injury in July to his right knee kept him out until October only for the same joint to flare up again in November, hampering his appearances for both club and country.

Having finally shaken off the medial knee ligament injury, Frings injured the same troublesome joint in training on Tuesday while training with Bremen.

"I feel overpowered by bad luck, I cannot explain how it happened," said Frings, one of Germany's key players ahead of their UEFA EURO 2008 campaign this June.

And his coach Thomas Schaaf was far from delighted with the news as his Bremen side are set to resume their Bundesliga campaign in February level on points with leaderrs Bayern Munich.

"It is a situation which is far from being satisfactory for us, we really counted on him for the second pahse of the Bundesliga," said Schaaf.

Frings is definitely out of Germany's EURO warm-up against Austria in Vienna on 6 February.

But there was some good news for Bremen with the news Danish midfielder Daniel Jensen has extended his contract until June 2011.

"We are glad that we could agree on an extension with Daniel," said Bremen's director of sport Klaus Allofs. "He has played well in the last few months and helped us enormously."

Jensen joined Werder in the summer of 2004, scoring six goals in 87 Bundesliga games and had attracted the interest of Greek side Olympiakos.

"There was interest from other clubs with better offers, but I want to stay with Bremen," Jensen explained.