Tottenham have confirmed that Lewis Holtby has agreed a permanent transfer to Hamburg.
Holtby, 24, joined Spurs in January 2013, but struggled to cement a starting role at White Hart Lane before joining Fulham on loan a year later.
The Germany international then joined Hamburg on loan last summer and made 22 Bundesliga appearances for the club, and has now sealed a move to Bruno Labbadia's side.
A statement on Spurs' official website read: "We have reached agreement with Hamburg for the permanent transfer of Lewis Holtby. The midfielder joined the Bundesliga side on a one-year loan in September, 2014, with a view to a permanent transfer.
"This option has now been exercised and Lewis leaves us having made 41 appearances in all competitions, scoring three goals, following his arrival from Schalke in 2013. We wish Lewis all the best for the future."
Hamburg narrowly avoided relegation last season in a dramatic playoff victory over Karlsruhe, preserving their status as the Bundesliga's "dinosaurs" -- the only side from the 18-club elite to have avoided the drop in the Bundesliga's 52-year history.