Real Madrid is eyeing Borussia Dortmund's Nico Schlotterbeck as they seek new central defenders following Dani Carvajal's injury. Schlotterbeck, 24, is a top Bundesliga defender, and Real's chief scout Juni Calafat has monitored him closely. His Champions League performance against Real Madrid may boost his value, with Dortmund asking 60-70 million euros. Florentino Pérez considers him a key target for the next transfer market.