Former world champion Michael Schumacher has called off plans to return to Formula One racing at the European Grand Prix in Valencia on August 23 due to a neck injury, he announced on his website on Tuesday.
The 40-year-old German, who won the world title seven times before retiring in 2006, had been primed to replace the injured Felipe Massa in the Ferrari team for the race in Spain and possibily for the rest of the season.
But he injured his neck in a motorcycle accident in February and medical tests showed that he had yet to fully recover.
"Yesterday evening, I had to inform Ferrari President Luca di Montezemolo and Team Principal Stefano Domenicali that unfortunately I'm not able to step in for Felipe," Schumacher said on his website.
"I really tried everything to make that temporary comeback possible, however, much to my regret it didn't work out.
"Unfortunately we did not manage to get a grip on the pain in the neck which occurred after the private F1-day in Mugello, even if medically or therapeutically we tried everything possible.