At 25 years old, Juan Foyth has this physical status:
Born in La Plata, Buenos Aires Province, Foyth began his career at hometown club Estudiantes de La Plata. He played for a number of years in the Youth academy, initially as an attacking midfielder, then moved to centre-back before he turned 16. He signed his first professional contract in January 2017, which linked him to the club until June 2019. He made his Primera División debut on 19 March 2017, against Patronato, aged 19. He went on to play a further six times in the league, with additional two appearances in the Copa Sudamericana.
Foyth joined Tottenham Hotspur for a reported £8 million on 30 August 2017, on a five-year contract. He made his debut on 19 September in an EFL Cup tie against Barnsley that Tottenham won 1–0.
Foyth made his Premier League debut on 3 November 2018 in a 3–2 away win against Wolverhampton Wanderers, where he conceded two penalties which were both converted. In his next league appearance, away to Crystal Palace, he scored his first career goal, handing Tottenham a 1–0 win. On 4 May 2019, he came on at half time for Toby Alderweireld and was sent off three minutes later for a foul on Jack Simpson in a 1–0 loss at AFC Bournemouth.
In October 2020, Foyth signed a new deal with Tottenham until 2024, and was then loaned to Spanish club Villarreal. He made his debut on 22 October, scoring in a 5–3 home win over Turkey's Sivasspor in the group stage of the UEFA Europa League. He made 11 more appearances in the tournament as his team won it, including a start in the final victory over Manchester United.
At the end of his loan season, Foyth signed for Villarreal in June 2021 on a five-year deal for a fee of €15 million. He became a key player at right back for manager Unai Emery, replacing veteran Mario Gaspar and covering for the injured Serge Aurier.
Foyth played for the Argentina national under-20 team in 2017. He made 12 appearances in total for the national youth team: nine at the 2017 South American Youth Football Championship in Ecuador, and another three during the 2017 FIFA U-20 World Cup.
Foyth received his first call-up to the senior Argentina national team for a number of friendly games to be played in October 2018. He made his debut on 16 November in a friendly against Mexico where he helped Argentina to a 2–0 win, being named man of the match and receiving wide praise for his performance in this match. He was selected for the team at the 2019 Copa América, and made his first start in the competition in the match against Qatar. He started as a right-back in three further games, including the semi-final they lost to Brazil 2–0, and the third-place play-off against Chile, which they won 2–1.