Borussia Dortmund defender Mats Hummels is being followed by Barcelona.

Sport says Barca sports chief Andoni Zubizarreta has identified the Germany international as a candidate to solve their concerns over coach Pep Guardiola's ageing defence.

Hummels came through the system at Bayern Munich, but his career didn't spark until his move to Dortmund.

His versatility is particularly admired by Zubi, with the defender capable of playing in midfield and wing-back.