( CNN ) -- Former world champion racing driver Michael Schumacher , who suffered severe head injuries in a weekend skiing accident in France , remained in stable condition Wednesday , his manager said . Sabine Kehm said Schumacher had been carefully supervised overnight . `` His condition remains stable overnight and this morning , '' she said . `` This is the good news -- however I do n't want to go into any further prospects because it 's much too early , as the doctors said yesterday , '' she said . Doctors treating Schumacher at the University Hospital Center of Grenoble will not give a news conference unless there is a significant change in his condition , she said . `` We are still in a critical situation , '' she said . Schumacher remains in an artificially induced coma . On Monday night , doctors carried out a surgical intervention that relieved some pressure on Schumacher 's brain . The surgery , which took about two hours , involved the removal of a large hematoma , the head of anesthesiology , Jean-Francois Payen , said Tuesday . Schumacher , the most successful driver in Formula 1 history , suffered severe head trauma after falling while skiing Sunday in Meribel , in the French Alps . Kehm recounted more details Tuesday of how the accident happened , gleaned from Schumacher 's son and friends who were skiing with him . The party was in an area of deep snow when Schumacher helped a friend who had fallen , she said . As he set off again and went to make a turn , he seems to have hit a rock hidden under the snow . This catapulted him into the air and he fell head down with all his weight onto another rock , she said , resulting in severe injuries to his head . He was not traveling fast at the time , she added . In a statement released Tuesday , Schumacher 's family expressed thanks for the outpouring of support from people around the world . `` They are giving us great support . We all know he is a fighter and will not give up , '' the statement said . Schumacher , who turns 45 Friday , won a record seven world titles in his spectacular Formula 1 career . CNN 's Saskya Vandoorne contributed to this report .
Michael Schumacher was closely monitored overnight and Wednesday morning . His condition remains critical but stable , his manager says . Doctors say it is too early to speculate about his long term prognosis . He suffered severe head trauma after falling while skiing in the French Alps .