the germans value their captain at £ 35million but in united 's favour he has had a relatively poor season occasionally clashing with supporters when results went against them earlier this season .
dortmund are keen to bring in sami khedira from real madrid as their new captain amid a summer of big changes following jurgen klopp 's announcement that he will leave the club at the end of the season .
hummels -lrb- left -rrb- struggled early in the season for dortmund and united hope to use that to their advantage .