Wales head coach Warren Gatland says he was surprised at England's midfield selection changes for the crunch match at Twickenham tomorrow, and he has had to alter his plans.
"We had been preparing for other players so we've changed our direction a bit," he said.
And he admitted that England's new midfield of Owen Farrell, Sam Burgess and Brad Barritt might not pose the same attacking threat as it might had George Ford and Jonathan Joseph been present.
"What has caused us problems with England in the last couple of years has been footwork," he said. "Joseph has caused us a lot of problems at centre, and [Anthony] Watson and [Jonny] May are great finishers.
"I'm not sure Burgess and Barritt have the same footwork, they are more direct as players.