Tottenham midfielder Kevin-Prince Boateng's loan at Borussia Dortmund is likely to be over after suffering a knee injury.

"We had wanted to wait until the end of the season to see how things went with Kevin," Dortmund chief Michael Zorc said.

"He is overpriced. He will not be able to show what he can do in the Bundesliga now, so perhaps that will make him cheaper."