The Argentina U20 international had been heavily linked with a move to Paris Saint-Germain, who agreed a deal for him last month, as reported by ESPN.
However, Foyth is instead poised to join Tottenham, who were linked with him earlier in the transfer window.
Foyth told El Dia: “It’s a club that bets on the young and I think I’m going to have a chance to play. I also spoke with Mauricio Pochettino and I liked what he said. It’s what helped me decide that Tottenham was the right place to continue my career.
“He told me to go, train and that I would be involved and I would play. He also told me what the club is like.”
Foyth will hope to be involved in Tottenham’s Champions League games, with Pochettino’s side to face Real Madrid, Borussia Dortmund and APOEL Nicosia.
“It’s a beautiful (Champions League draw). Those teams are very nice to play, but at first, I think about being able to settle there fast and catch up.
“The greatest dream of every footballer is to play in the Argentine national team. But I don’t want to think about that now, but to settle at Tottenham.”
Renowned for his composure on the ball, Foyth can also play as a defensive-midfielder if required and broke into the Estudiantes side last season, making seven league appearances.
Given that he is just 19 years old Foyth won’t be expected to immediately break into the Tottenham starting line-up but he possesses much potential and is set to act as a replacement for fellow centre-back Kevin Wimmer, who is poised to join Stoke City.
Tottenham have made two signings so far in this transfer window, bringing in defender Davinson Sanchez from Ajax and goalkeeper Paulo Gazzaniga from Southampton, while they are reportedly close to signing right-back Serge Aurier from Paris Saint-Germain.