Professor Yohan Payan added: "I'd say this accident happened in the right place because he was taken into hospital immediately and operated on as soon as he arrived, this meant his state is critical and he is still in a coma and he will be kept in a coma.
"Everything that needed to be done has been done at the moment we can't really say when he will recover, we cannot answer this yet."
Professor Payan continued: "We can say he is fighting for his life. We judge him to be in a very serious situation. We cannot tell what the outcome will be yet. We are working hour-by-hour but it's too early to say what is going to happen and to have a prognosis.
"We think his helmet did help, without a helmet he wouldn't be here now."