Wolfsburg pair Diego and Simon Kjaer have been informed that they will be forced to stay with the club if they fail to secure transfers by the end of the month.
The duo were sent out on loan last season following a difference of opinion with coach Felix Magath and both were expected to depart the German club this summer as a result.
However, Magath now appears to be willing to make both players part of his squad for the new season.
"It's obvious that players of the class of Diego and Simon Kjaer will be unavailable for transfer if it reaches August," he told Bild.
"If they haven't worked out their transfers away from the club by then, they will be staying with us for the season."
Both have contracts with the club until 2014.
