Tottenham could be set to raid Barcelona for up to three of their defensive starlets.
Spurs have already been linked with Martin Montoya and Marc Batra, but skysports.com understands they are also in the market for left-back Carles Planas.
20-year-old Planas is currently with Barca's B side and is a Spanish Under-21 international.
The player is contracted to Barca until next summer, but they are yet to decide on his future.
Sources believe they could allow him to leave with the option of a buy-back within two seasons.
Planas' progress in recent years was hampered by injury but he is now fully fit and impressing for the second-string.
Both Batra and Montoya have made their first-team debuts, but could also be available this summer and Spurs are monitoring the situations of all three players.