The Independent's Chris Hewett previews what is likely to be a testing day for England debutant Alex Corbisiero against Italy at Twickenham.
"England thought they knew precisely where they stood in relation to this year's Six Nations Championship following their precious opening-round victory in Wales eight days ago.
"Suddenly, they find themselves thinking again. The withdrawal of their Lions prop Andrew Sheridan from this afternoon's meeting with the strong-scrummaging Italians at Twickenham means Alex Corbisiero of London Irish will make his debut at loose head against no less a figure than the fearsome Martin Castrogiovanni. It should be quite a meeting of minds.
"Born in New York, the newcomer has Italian ancestry: his grandfather Riccardo left the tough southern city of Naples for the Big Apple in the 1950s. The Argentine-born Castrogiovanni, widely acknowledged as a godfather of the set-piece, also has links to a part of Italy where the words "respect" and "honour", long part of the front-rower's vocabulary, take on a slightly darker hue. His folks hail from Sicily. "Real mafia country," as he once said."