Borussia Dortmund defender Mats Hummels is emerging as a top target for Barcelona.

El Mundo Deportivo says Barca are stepping up their interest in the young Germany international after being frustrated in their pursuit of AC Milan defender Thiago Silva and Athletic Bilbao's Javi Martinez.

Barca chiefs like Hummels' versatility, convinced the defender can also fill in for Sergio Busquets in midfield when needed.