Mikel Merino has joined Newcastle permanently from Borussia Dortmund in a deal thought to be around £9.2m.
Newcastle player Mikel Merino in action during the Premier League match against Stoke City.
Newcastle United have confirmed the signing of Mikel Merino from Borussia Dortmund after making his loan deal a permanent one.
While officially the fee for the midfielder is undisclosed, the Newcastle Chronicle reported that the Magpies paid an initial £2.7m to loan him and a further £6.5m to make it permanent - a £9.2m outlay in total.
Newcastle player Mikel Merino (l) is challenged by Philippe Coutinho of Liverpool.
Merino has signed a five-year deal with the North East club and this could already prove to be their biggest deal of the season, if not for the past few years.
The Spaniard is still just 21-years-old but has shown already this term that he is an important first team player for manager Rafa Benitez, featuring in all seven of the Premier League outings to date.
Newcastle United manager Rafa Benitez during the Premier League match against Stoke City.
Merino acts as a shield for a defence who have conceded just five league goals so far in 2017/18 - a statistic only bettered by top two Manchester City and Manchester United - but is also reliable in possession and important in moving the play forwards.
To have signed a young player for such a relatively small fee is impressive business and although fans at St James' Park will not want to be thinking about life without the Spain Under-21 international just yet, the sell-on potential of the midfield ace is huge.