- Tyne Tees
Paraguay international Cristian Riveros has made a permanent switch to Turkish side Kayserispor.
The 29-year-old joined the Süper Lig team on loan last summer, and will now stay with the club after they agreed an undisclosed fee with Sunderland.
The midfielder signed for the Black Cats from Mexican side Cruz Azul in May 2010. He made 14 appearances, scoring once in a 3-0 win over West Ham.