McLaren is hopeful that Kovalainen will be able to race at the Turkish GP on May 11, but the extended hospital stay could change that. Though he suffered no broken bones or head injuries, Kovalainen had told the team he was shaken by the crash. McLaren said a wheel rim failure caused the front left tire of his car to explode as he came running into the high speed turn No. 9. Kovalainen, who was on his 22nd lap, was at nearly full speed into the wall, which was backed by five rows of tires. The Finn, who started the race from sixth, was in the lead at the time after the leaders had pitted.

"It's possible that some debris worked its way inside the rim, but we still have to analyze that," Whitmarsh said.

Several drivers had spun out at that same corner on the first two days of practice on Friday and Saturday.

Elsewhere, Super Aguri could find out this week that it has raced in Formula One for the last time.

A meeting with backer Honda in Japan tomorrow could decide the future of the struggling tailender after it limped through the first European grand prix of the season.

"They don't look in very good shape at the moment, unfortunately," Formula One supremo Ecclestone said. "I want them to stay, I've been helping them the last week."

Former racer Aguri Suzuki told reporters that the meeting was set to be a key point in the battle to save the team that he founded and brought into Formula One in 2006.

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