Leicester chief Richard Cockerill calls for crackdown on foul play involving head injuries after Toby Flood blow Tuohy was shown the yellow card by referee Tim Wigglesworth, but there was no citing commissioner at the game as it was a pre-season match. "We have yet to receive any formal citing from Leicester," said an RFU spokesman on Tuesday. Flood will spend the week at home before returning to training next week. He was taken to Leicester Royal Infirmary after needing oxygen on the pitch before being taken off on a stretcher. He was released on Saturday night. "You can't be too careful when there are potentially serious consequences with an injury," said Cockerill. At Leicester we will always take the cautious, conservative view. It is disappointing to lose Toby but his long-term health is far more important than any short-term considerations. The scans are clear but there will still be protocols to go through. We would hope to reintegrate him next week with the chance of playing against Bath but certainly against Newcastle the following week. One of Leicester's new recruits, former Gloucester and Northampton fly-half Ryan Lamb, might find himself thrust into the fray. This weekend the champions are also expected to be without centre Manu Tuilagi and scrum-half Ben Youngs, both of whom are nursing shoulder knocks.