Eriksson expects to pick Rooney in his initial squad

Rooney faces an anxious wait before learning whether he will be fit enough to go to the World Cup with England.

"It won't do any harm. Everything is worth a try at this stage," said Manchester United boss Ferguson.

But Sven-Goran Eriksson has vowed to take the 20-year-old to Germany even if he is only fit for England's ultimate target - the final on 9 July.

We want Wayne to do himself justice and we will not jeopardise the boy Manchester United boss Sir Alex Ferguson

Earlier this week, the Football Association was forced to deny reports of a rift with United over the best way to treat Rooney, and Ferguson said the two camps were working together.

"There is an open dialogue between ourselves and England," said Ferguson.

"They will get an update every week on how he is doing and if they want to send a physio or a doctor up they are free to do so.

"As I have said all along, we will do our very best to help Wayne get there. It is in our interests, as well as England's, to do that."

The metatarsal - football's latest fad?

Ferguson confirmed Rooney suffered two breaks to the same metatarsal when he went over on his foot at Stamford Bridge on Saturday but said confirmation of the second break would have no effect on the player's recovery programme.

"The break he has got in the fourth metatarsal is a small fracture but the one slightly above it is nothing to worry about at all," he said.

"It doesn't affect the recovery, there is no damage there at all."

Ferguson stated there would be no deadline placed on Rooney regarding his fitness for the World Cup.

"In a few weeks time we will send him back for another scan. If it has healed then we have the progress we want. If it has not healed, there is nothing you can do about it.

"We will do our very best to get him there. It is in our interests as well as England's to do that. But we want him to do himself justice and we will not jeopardise the boy."