Tottenham Hotspur are signing Juan Foyth from Estudiantes on Monday after allowing defender Kevin Wimmer to join Stoke City for £15million.
Austrian Wimmer will arrive at the bet365 Stadium where Stoke captain Ryan Shawcross is expected to see out the last year of his contract.
Teenage centre back Foyth, 19, has been capped at Under 20 level by Argentina, but is unlikely to play regularly for Spurs this season.
Tottenham also have a deal in place to sign Serge Aurier from Paris Saint-Germain, pending Home Office clearance.