Budapest - Ferrari team principal Stefano Domenicali has not ruled out the possibility of seven-time Formula One world champion Michael Schumacher coming out of retirement as a temporary replacement for Felipe Massa.

"It would be wrong to say yes or no at this stage," Domenicali told the Tagesspiegel newspaper Monday when asked about the chance of Schumacher returning to the track for the European Grand Prix in Valencia on August 23.

"We will think about it this week."

Massa remains in a Budapest hospital after being hit on the helmet by a piece of flying debris from the car of Brawn GP's Rubens Barrichello during qualifying Saturday for the Hungarian Grand Prix.

The Brazilian suffered a fractured skull and concussion but a spokesman for the Hungarian Defence Ministry said on local television on Monday that Massa was now able to move his arms and legs.

"This can be taken as a good sign," Istvan Bocskai said.

Bocskai noted that, although the signs were good that Massa could make a full recovery, it was still too early to make a final declaration on his condition.

Schumacher won two F1 world titles with Benetton before moving to Ferrari in 1996 where he won five consecutive drivers' crowns from 2000-2004.

The 39-year-old German retired at the end of the 2006 season but has remained with Ferrari as an advisor. (dpa)