The American rider is being taken care of at the Maurizio Bufalini Hospital in Cesena but the medic's report isn't that good. Italian media quoted the hospital as saying on Wednesday that Hayden had suffered a cerebral edema and lower body fractures and surgery had not been possible immediately because of his condition.
Hayden popularly known as the "Kentucky Kid" won the MotoGP world championship in 2006 with the Repsol Honda team denying Valentino Rossi a sixth consecutive title.
Nicky Hayden was brought to hospital in serious condition with severe head and chest injuries after the road accident near Rimini.
Red Bull Honda World Superbike Team has released a statement about Nicky Hayden, who was involved in an incident while cycling near Rimini, Italy on Wednesday, May 17.
American motorcycle racer Nic.
He was joined by his fiancée Jackie along with his brother Tommy and mother Rose, at the hospital.
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"Once Nicky's condition was stabilised, he was transferred to Maurizio Bufalini Hospital in Cesena and remains in the hospital's intensive care unit".
From the past season, he returned to the Superbike Championship with the Red Bull World Superbike Honda, replacing Sylvain Guintoli alongside Michel van der Mark.
Hayden began racing in the World Superbike Championship in 2016. He competed in Moto GP from 2003-2015.
The 35-year-old Hayden won the MotoGP title in 2006.
"With a bit more time you start to understand, it's a great shame because Nicky was a great rider", he added.
Britain's Tour de France champion Chris Froome escaped unhurt this month while having his bike written off in a hit-and-run incident near his Monaco home.