Newcastle are closing in on Deportivo La Coruña defender Fabian Schar after activating a £3m release clause in his contract, according to the report.
The Swiss international is due on Tyneside on Wednesday and will undergo a medical with the club.
Newcastle are looking to replace Chancel Mbemba, who they sold to Porto for £7m earlier this month.
The 26-year-old left Basel to join Hoffenheim in 2015 where he made 30 appearances before joining Deportivo last year.
He has played 42 times for Switzerland and was a key figure as they reached the last 16 of the World Cup in Russia.