Tottenham sets condition for Lucas Bergvall exit in January transfer window

• Tottenham set a condition for Lucas Bergvall's exit in the January transfer window.
• Barcelona is monitoring Lucas Bergvall closely.
• Tottenham will consider letting Bergvall leave only if their condition is met.
• Lucas Bergvall is a 20-year-old Sweden international midfielder.
• The condition set by Tottenham is not disclosed in the reports.