Mauricio Pochettino has long been an admirer of Foyth and targeted the young defender all summer, although the move to bring him to North London was jeopardised by interest from Paris Saint-Germain.
But it appears Pochettino was instrumental in persuading the 19-year-old to move to the Premier League.
Speaking to Argentinian newspaper El Dia, Foyth said: “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 was 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 I would play. He also told me what the club was like, what job idea it had.”
Who is he?
The 19-year-old is a central defender was born in La Plata. He’s not the tallest, coming in under 6ft tall at almost 5ft 11ins.
He made the breakthrough into the Estudiantes first team last year as the team earned a Copa Libertadores place.
Foyth is comfortable on the ball and has a good range of passing. When asked about his heroes recently, he said: “I like European football. There I try to copy Mats Hummels [Bayern Munich] and Gerard Piqué [Barcelona].”
What did he do last season?
He began to get chances under Nelson Vivas last season, playing seven matches in the Primera Division, getting 630 minutes of action under his belt.
Foyth was then an ever present as Argentina put in a disappointing showing at the U20 World Cup and his performances back home and in South Korea began to draw admiring glances.
Who else wanted him?
Spurs were reportedly keeping an eye on him for some time as his performances in Estudiantes’ academy drew attention from all corners.
As well as PSG, Serie A giants Roma were also strongly linked while Russian outfit Zenit St Petersburg were sniffing around the defender.