Real Madrid: Salisu at the top of Zidane's list
Madrid have been keeping tabs on the Valladolid centre-back, whose release clause is a snip at 12 million euros. Atlético and Man United have also made enquiries.
The form of Valladolid's centre-back Mohammed Salisu has put numerous big clubs around Europe on the alert, including Real Madrid.
Valladolid's defensive record
The 20-year-old has quickly become a key component in Sergio's side as they fight to stay in Spain's top flight, with their problems stemming more from a lack of goals (only 19 in 23 games) than at the back - they have only conceded 25 this season, largely due to Salisu.
Real Madrid on the alert
Madrid, however, know they face competition to sign the 20-year-old this summer - Atlético have also made enquiries, as have Manchester United, while Valencia and Getafe have also shown an interest in the past - but Los Blancos are confident they will be first in line due to the amicable relationship between Florentino Pérez and Ronaldo Nazario.