Granit Xhaka has officially completed his move from Bayer Leverkusen to Sunderland.
The transfer fee is believed to be around 17.3m - an initial 13m with up to 4.3m in add-ons.
Xhaka agreed personal terms with Sunderland Xhaka on a three-year contract.
The move sees the 32-year-old make a Premier League return, having previously played for Arsenal.
Its exactly what I wanted, and I have a very good feeling. We are back to where this club needs to be, and we want to stay here to write our own history, Xhaka told Sunderlands official website.