Doctors are keeping Felipe Massa in a coma after he suffered a serious head injury during qualifying for the Hungarian Grand Prix. The Ferrari driver fractured his skull in two places in the freak accident on Saturday. The 28-year-old was struck by a spring that had worked loose from Rubens Barrichello's Brawn GP during the middle 15-minute period of qualifying. Massa then drove into a tyre barrier at 170mph. Stricken in the car, photographs emerged showing a fist-sized dent in his helmet, and with the visor up, there was a large cut over a blackened left eye.