The 21-year-old arrives from Mauricio Pochettino's former club on a season-long deal and will compete with Hugo Lloris and Michel Vorm for first-team opportunities
Tottenham has strengthened its goalkeeping options amid Hugo Lloris' injury with the signing of Espanyol goalkeeper Pau Lopez on a season-long loan.
Lloris suffered a hamstring injury on the opening day of the Premier League season against Everton and has been sidelined since, leaving Michel Vorm as the club's only senior goalkeeper.
Vorm, who replaced Lloris at Goodison Park, has started both matches since, keeping a clean sheet in the 1-0 win over Crystal Palace and making crucial saves in a 1-1 draw with Liverpool.