Havard Nordtveit has signed for Hoffenheim from West Ham after just one season at the Premier League club.
Nordtveit, 26, joined West Ham from Borussia Monchengladbach last summer but made just 11 league starts under Slaven Bilic.
The Norway international has now departed for Bundesliga side Hoffenheim, where he has signed a contract until 2022.
"I obviously know the Bundesliga very well from my years at Gladbach and I'm convinced I will be able to make the impact that TSG are hoping for," Nordtveit told Hoffenheim's official website. "Hoffenheim's playing style and [director of football] Alex [Rosen] and [coach] Julian's [Nagelsmann] extensive efforts to bring me to the club were decisive factors in reaching a decision."
Velkommen to Hoffenheim, Håvard #Nordtveit. The 26 year old midfielder has signed a contract until June 2022 👉 https://t.co/u0KkZIT1gj. #tsg pic.twitter.com/xB7PpJJ4gn
— TSG Hoffenheim EN (@achtzehn99_en) June 20, 2017
Nagelsmann added: "In Havard, I am convinced that we have found a player who will give our game another dimension. He brings with him the perfect attributes needed for a centre-back in a back three or a back four, and can even play to a high level as a defensive midfielder."
Nordtveit becomes Hoffenheim's third signing of the summer following the arrivals of Florian Grillitsch and Justin Hoogma.
Rosen added: "He is much more than just a strong addition to our squad on a sporting level. Havard is also a big personality off the pitch. Without his willingness to make a personal financial sacrifice, this transfer would never have been possible.
"Despite having already played at the highest level in the Bundesliga for a number of years, his development is by no means over. He is thoroughly convinced that working under Julian will be able to help him further improve his game."