Hamburg have announced the signing of goalkeeper Rene Adler from Bayer Leverkusen on a five-year deal.
Germany international Adler, 27, has struggled for fitness in recent times but Hamburg director of sport Frank Arnesen believes it is a great signing.
"When you can sign a Germany international at the age of 27 then that is a special opportunity and we have taken it," Arnesen said. "I hope that he can return to the national team off the back of excellent performances for Hamburg. He is very optimistic and ambitious to get back to his previous form."
Adler, who did not play a game for Leverkusen last season following knee surgery, said: "I think that I will come out of this last year stronger than ever.
"It was a tough time and I had to come through lots of low moments during rehabilitation, but it has all paid off in the end. I now feel top fit and am ready."