Seven-time Formula One champion, Michael Schumacher underwent a brain surgery and is in a critical condition. The 44-year old retired German driver struck his head in a ski accident in the French Alps yesterday. He was airlifted to a local hospital, then, an hour later, to the better-equipped Grenoble facility. Doctors said, Schumacher was suffering a serious brain trauma with coma on his arrival, which required an immediate neurosurgical operation. They said, he is in a critical condition.