You fail to see the difference between an elbow injury and a knee injury. Mikel can jeopardize his career if he continues to aggravate it, which means he can never play for Nigeria or Chelsea ever again. You also keep bringing up Rooney/Terry/Ronaldo/Drogba. What do they have to do with anything? How do you know they wouldn't do the same? What gives you the right to question his commitment for Nigeria anyways.