Martin Johnson has warned against people expecting too much, too soon, from Andy Farrell in rugby union.
The Great Britain rugby league captain is on the verge of signing for a Premiership club - believed to be one of Leicester, Wasps or Northampton - but Johnson believes it will take him some time to adjust to the different demands of the union game.
The 29-year-old Wigan star is being touted in some sections of the media as the answer to England's current problems, but Johnson dismisses such a notion.
''If he wants to come to union then good luck to him but it is a brave decision,'' Johnson told BBC Five Live.
''Someone asked me the other day whether he is going to be the answer to England's leadership problems and I couldn't believe the question.
''He has not even played a game of rugby union as far as I'm aware.
''If he wants to come he has to develop into a rugby union player first and I'm sure he has the ability to do that.
''Then you look at going beyond that and seeing if he can play at international level.''