Sources: Tottenham stand firm as Bayern Munich make informal enquiry for defender

Tottenham Hotspur’s long-term defensive planning has been thrust into the spotlight after highly rated youngster Luka Vušković unexpectedly became the subject of intense interest from some of Europe’s biggest clubs ahead of the winter transfer window.

The 18-year-old centre-back, currently gaining valuable experience on loan at Hamburger SV, has caught the eye with a series of composed and authoritative performances in Germany, prompting enquiries from the Bundesliga’s elite.

The 18-year-old centre-back...