By FOX Sports Staff
Hummels has been linked with a move from Dortmund after two impressive seasons anchoring them to Bundesliga titles but has previously announced that he is happy to stay at the club for the forseeable future.
However, he has admitted in his latest interview that an offer from Barcelona could make him reconsider his future.
"My father and I would turn down about 99.9 per cent of all the clubs in the world if they approached us," Hummels told Sport Bild.
"However, Barcelona are one out of two or three teams that could make me consider a summer transfer."
Barcelona are currently facing a dearth of defenders and are currently looking to sign back-ups for veteran defender Carles Puyol.