Jacques Villeneuve, Michael Schmacher's great rival in 1997 when the Frenchman won his sole Drivers Championship, has spoken of his “shock” at Schumacher's accident.
The seven-times world champion has been in a comatose state at Grenoble Hospital after suffering severe head injuries in a skiing accident on 29 December.
The last official word on Schumacher's condition was released on Thursday, with his manager saying that he remains "in a waking up process", two weeks after doctors at the University of Grenoble hospital began the delicate job of bringing him out of an induced coma.
Villeneuve, who will contest the inaugural season of the World Rallycross Championship, offered kind words to Schumacher's family, as they wait by his bedside in Grenoble.
"I was really shocked [by the news of the accident]," Villeneuve told Sky Sports. "It is really hard on his family, because they are waiting and they have no idea what will happen. If he gets out of it, how he will get out of it and what state he will be [in].That's a terrible position [for them] to be in."
The 42-year-old said that Schumacher needed that surge of adrenaline in his life, after his high-octane career in Formula One, and hopes that his family stay strong.
Career in Pictures: Michael Schumacher
Career in Pictures: Michael Schumacher
1/17 February 2006
Michael Schumacher is seen in the pits during a training session at the Ricardo Tormo racetrack in Cheste near Valencia in 2006
2/17 November 1994
Hugging two team mechanics in delight for becoming World Champion Driver after the Australian Grand Prix at the Adelaide circuit in November 1994
3/17 October 1995
Flavio Briatore carries a jubilant Michael after he wins the Pacific F1 Grand Prix at Aida in Japan, and wins his second World Drivers Championshp
4/17 February 1996
Schmacher pushes his Ferrari back to the pits after engine trouble left him stranded at the entrance of the pitlane during pre-season testing at Estoril, Portugal
5/17 March 1996
During the Australian Grand Prix in Melbourne
6/17 March 1997
Michael Schumacher in the pit lane during the Australian Grand Prix at Albert Park in Melbourne, Australia
7/17 October 2000
Celebrating on the podium after winning the formula one world championship at the Japanese Grand Prix at Suzuka, Japan
8/17 July 2006
Michael Schumacher of Germany and Ferrari leads the pack into the first corner at the start of the French Formula One Grand Prix at the Nevers Magny-Cours Circuit
Lars Baron/Bongarts/Getty Images
9/17 October 2010
Michael Schumacher drives during the Korean Formula One Grand Prix at the Korea International Circuit
Clive Mason/Getty Images
10/17 October 2011
Michael Schumacher and Mercedes GP waves to the crowd as he attends the drivers parade before the Indian Formula One Grand Prix at the Buddh International Circuit on October 30, 2011 in Noida, India
11/17 December 2011
Sebastian Vettel and Michael Schumacher celebrate after winning the Nations Cup at day one of the race of champions event at the Esprit Arena
12/17 June 2012
Michael Schumacher drives at the Valencia Street Circuit on June 22, 2012 in Valencia during the first practice race of the European Formula One Grand Prix
13/17 September 2012
Michael Schumacher crashes into the back of Jean-Eric Vergne of France and Scuderia Toro Rosso during the Singapore Formula One Grand Prix in September 2012
14/17 November 2012
Schumacher drives in his last race during the Brazilian Formula One Grand Prix at the Autodromo Jose Carlos Pace
Mark Thompson/Getty Images
15/17 December 2013
Deputy director Jean Marc Grenier talks to media outside the CHU Nord hospital in Grenoble, French Alps
16/17 December 2013
Members of the staff are seen outside the emergency services at the CHU Nord hospital in Grenoble, French Alps; this is the hospital where retired seven-times Formula One world champion Michael Schumacher is reported to be hospitalized after a ski accident
17/17 December 2013
A Scuderia Ferrari and Michael Schumacher fan waits, on December 29, in Grenoble, in front of the emergency department of the Centre Hospitalier Universitaire hospital
"We all live on the edge, and Michael certainly did. That's how he won championships, how he went motor bike racing. He needed that adrenaline to kick in, and he needed to always overcome himself.
"[On his ski accident] There he got caught out on a leisurely day so that's really tough and when bad luck hits there's very little you can do and his family just have to figure out how to survive it."