Wayne Rooney's World Cup doctor has warned the sidelined England star he will risk another broken foot if he returns from injury too soon.
Manchester United forward Rooney, out with a broken metatarsal for the third time in three years, is desperate to make his comeback in United's game at his former club Everton on Saturday.
That would mean just a fiveweek lay-off, the quickest return of any top player to suffer a broken metatarsal in recent years.
David Beckham, Michael Owen, Steven Gerrard, Ashley Cole, Gary Neville, Scott Parker and Danny Murphy all took at least seven weeks to recover.
Rooney was out for six weeks last year and 14 in 2004.
Professor Chris Moran, who assessed Rooney's metatarsal before the World Cup and an expert in bone and muscle injuries, said: 'Wayne is a fit, young lad very, very keen to return as he lives to play football. But players must be held back to stop themselves causing more damage. If you come back too early, there's a risk of re-fracturing and having a setback.
'Full-blooded and combative players (like Rooney) are more likely to get injured but Wayne's been very unlucky to have three.'