Prop Alex Corbisiero likely to be ruled out of England squad for autumn internationals due to knee problem The in-form Allen had been tipped by Richard Cockerill, the Leicester director of rugby, to replace either his club team-mate Manu Tuilagi or Saracens' Brad Barritt, who are both out of England's autumn campaign. But now Allen, a member of England's second-string Saxons squad, faces three months of rehabilitation after suffering "compartment syndrome" - the compression of muscle tissue by a blood clot - in his left leg during a draw with Northampton on Oct 5. Cockerill said that Allen, 27, was fortunate that his injury had been swiftly and properly diagnosed because it might have led to "horrendous" complications, including gangrene. "It is a very unusual injury and thankfully our medical staff spotted it early enough," said Cockerill, whose club injury list has now increased to 12 going into Friday's Heineken Cup match against Treviso at Welford Road. Cockerill said Leicester's medical staff became concerned when Allen began complaining that his injury was becoming more painful and he was examined by a trauma surgeon after undergoing a scan. Elsewhere, Scarlets prop Samson Lee faces a ban of two to nine weeks after being cited for allegedly stamping on Danny Care in Saturday's Heineken Cup victory over Harlequins. Lee, who was sent to the sin-bin at the time, will appear before an independent judicial officer in Dublin tomorrow.