Chelsea defender Michael Mancienne, loaned out to Wolves for the past three seasons, has signed a four year deal with Bundesliga side Hamburg.
Hamburg's sporting director Frank Arnseon said: "I knew Michael from my time at Chelsea, I have followed his progress over the years and I know he has great potential."
Mancienne said: "Hamburg is a huge club with a fantastic tradition and supporters. It's a big challenge to be able to play for them."
The former England Under-21 international was first loaned out to Wolves in the 2008/09 season, helping them gain promotion from the Championship to the Premier League.
He rejoined the Midlands club for 2009/2010 and was used initially as a central defender and then in a holding midfield role, and returned there again last season.
The 23-year-old has penned a contract reported to be in the region of 3.5 million euros until June, 2015.