"He is still in the intensive care unit of Cesena's Maurizio Bufalini Hospital and the prognosis stays reserved". His condition is still extremely critical.
"Following the incident, Nicky was treated on site by medical staff and then taken by ambulance to a hospital near Rimini for immediate treatment", Red Bull Honda said in a statement.
The smashed window of a auto that hit the bicycle of American motorcycle racer Nicky Hayden while he was training in Rimini, Italy, Wednesday, May 17, 2017.
Former world motorcycling champion Nicky Hayden was in "extremely critical" condition on Thursday following a serious bicycle accident which left him with brain damage, as his fiancée and mother kept a vigil at his bedside.
Doctors placed the 2006 MotoGP champion into a medically induced coma, the BBC reported.
Hayden's fiance Jackie, his brother Tommy, and mother Rose have also arrived in Italy to be by his side in these hard moments.
Valentino Rossi said: "It's a great shame because Nicky is a great rider for sure, a great talent, a world champion and always at the top, but especially a very good guy".
He spent a further nine years in MotoGP racing with Ducati and the Aspar team before making a switch to the Superbike series and now rides for the Red Bull Honda World Suberbike Team. In the MotoGP, he ran 218 Grand Prix races with three wins and 28 podium places. The incident occurred in eastern Italy after his cycle collided with a vehicle. "For Nicky, we're all with you", the Italian MotoGP legend added.
The dangers of training on public roads have been highlighted in recent weeks by other accidents affecting professional athletes.