England captain David Beckham has vowed to win the World Cup for Michael Owen, who is unlikely to play any further part in the tournament after he was taken off on a stretcher during the match against Sweden.
The Newcastle player, appearing in his 80th game for England, went down clutching his knee after just one minute of England's 2-2 draw in Cologne and was carried away in agony.
No other player was involved.
It is thought to be a ligament injury, which could keep him out for up to six months.
A scan at England's base camp in Baden-Baden is expected to determine how serious the problem is.
Coach Sven-Goran Eriksson said Owen, who has still not fully recovered from a broken foot sustained on New Year's Eve, could be out for the rest of the tournament.
"Maybe he's out of the tournament, I'm not sure. It doesn't look good," said the Swede, who has a major headache with just three strikers to call on -- a recovering Wayne Rooney, Peter Crouch and untested teenager Theo Walcott.
Beckham, a former Real Madrid teammate of Owen, said that the squad was devastated by his injury and vowed to win the World Cup for him.
"That's what we said at half time when we came in and we knew it was a bad injury," he said.
"We hope it's not as bad as it looks but we're not too sure.