Sunderland have completed the permanent signing of Spurs winger Jack Clarke following a loan spell at the Stadium of Light last season.
Clarke joined Sunderland on loan in January and made 20 appearances on the way to helping secure promotion to the Championship via the play-offs.
Manager Alex Neil described Clarke as "a player with huge potential".
The winger, who has previously played in the Championship for Leeds, Stoke and QPR, says he is "delighted to be back".
"It felt right to return and after winning promotion to the Championship last season, I'm excited to play my part in the next step of our journey," he added.