Sunderland have announced the signing of Tottenham midfielder Teemu Tainio.

The Finnish international, 28, has penned a three-year contract and is Roy Keane's first summer signing.

"Teemu has showed versatility, playing in different midfield positions for both Tottenham and his previous club, Auxerre," said Sunderland boss Keane.

"But his experience in particular and the fact he has played more than 40 international games shows he has a lot to offer Sunderland."