Sought-after Germany central defender Mats Hummels has said he did not include a release clause in his Borussia Dortmund contract in order to set an example for his teammates. Hummels, oneof the stars for Germany at the World Cup in Brazil, had been linked with moves to Manchester United and Barcelona this summer. While he would not rule out a move in the future, the 25-year-old said,“he couldn’t be happier at any other club in the world right now.”