Doctors at Grenoble University Hospital have confirmed that Michael Schumacher's condition has improved slightly, but added that they "can't say he is out of danger".
At a news conference which was held at 10am GMT on Tuesday, doctors confirmed that a second operation on the seven-time Drivers' Champion took place overnight after a fresh scan showed "an improved situation" which provided them with an opportunity to operate again.
Following the procedure, Schumacher's condition showed a "slight improvement".
They added that the 44-year-old German's condition is "more under control" than it was on Monday, but admitted that it is "still too early to say that he is out of danger".
"It is better than yesterday," Grenoble Hospital Director General Jacqueline Hubert said at the press conference.
"But all the family is very much aware that his state is still sensitive and anything can happen."
Earlier, the surgeon that performed the first operation, Stephan Chabardes, admitted that the next two days will be decisive in determining whether or not the F1 legend recovers from the accident.