LONDON (REUTERS) - Tottenham Hotspur completed their third signing of the transfer window when defender Juan Foyth joined the Premier League club from Argentina's Estudiantes on Wednesday (Aug 30).

Spurs said the 19-year-old, reportedly a target for Paris St Germain, had signed a five-year deal.

Last week, they signed Colombia central defender Davinson Sanchez from Ajax Amsterdam for a club record fee reported to be about £42 million (S$73 million), and they have also brought in goalkeeper Paulo Gazzaniga from Southampton.

No tansfer fee was disclosed by Tottenham for Foyth, who represented Argentina at the 2017 Under-20 World Cup, but local media said it was £8 million.

"This club believes in young players and I'm very happy to be here," Foyth told Spurs' website (www.tottenhamhotspur.com).

"I think there's a wonderful project here."

Tottenham boasted the best defence in the league last season but have sold England right back Kyle Walker to Manchester City and Austrian stand-in centre back Kevin Wimmer to Stoke City.

The north London club are reportedly close to confirming the signing of PSG's right back Serge Aurier.

Spurs, runners-up to Chelsea last season, have suffered a disappointing start to the current campaign, picking up four points from the opening three matches.