Tottenham have signed 21-year-old Czech goalkeeper Antonin Kinsky from Slavia Prague in a deal worth about £12.5m.
Spurs have been without first-choice keeper Guglielmo Vicario since he fractured an ankle on 24 November during the 4-0 win over Manchester City.
Fraser Forster has been deputising for Vicario, but he missed Saturday's 2-1 defeat by Newcastle with illness, which led to a debut for 25-year-old Brandon Austin.
Spurs have only won two of their past 11 games and are 12th in the Premier League.
Kinsky has agreed a deal until 2031 and the move is subject to the granting of international clearance and a work permit.