World Cup winner Lawrence Dallaglio admits he was proud of England's performance in winning a Six Nations match in Ireland for the first time since 2003, but has warned the Red Rose not to become too 'fixated' on claiming the Grand Slam.

Lawrence Dallaglio

At the launch of his new book, World Cup Rugby Tales, England legend, Lawrence Dallaglio expressed doubts for England ahead of the World Cup.

The 39 year old won the World Cup with England in 2003 so knows what it takes to win. He believes that Martin Johnson's side will not be strong enough to take on the likes of Australia, New Zealand and South Africa. Click Read More to see what he had to say and view our statistical overview of England's chances based .