Newcastle United have made midfielder Mikel Merino's loan move into a full-time transfer from Borussia Dortmund.
Merino, 21, who joined Newcastle on loan from the Bundesliga club in the summer, has signed a five-year contract.
He has played in all seven Premier League matches this season and won the club's Player of the Month award for August.
The Spain under-21 international told the official Newcastle website: "I'm really happy to be here for five more years, and I hope to keep playing for this club and to give good things to all the people and the club.