Manchester City chief Txiki Begiristain has paid tribute to Ilkay Gundogan.
The midfielder's move to Barcelona was confirmed this morning.
Begiristain said: Ilkay has been a wonderful servant for Manchester City, and he leaves our club on a very special high having captained us to a historic Treble.
He has played a huge part in the successes we have enjoyed in recent seasons and Ilkay's intelligence, leadership and commitment to the Club - both on and off the field - has been an inspiration to everyone.
Ilkay has truly cemented his place in the history of Manchester City and we all wish him well in the next chapter of his career.
And he leaves us knowing that he will always be welcomed at this football club."