Mike Tindall believes England captain Chris Robshaw will be the top contender to lead the British and Irish Lions if he wins the Grand Slam.
England need to beat Italy at Twickenham and Wales away to complete their first Grand Slam since 2003.
Robshaw's England career
- May 2009 -
Plays in England's 33-26 defeat by the Barbarians
- June 2009 -
Wins first cap as England lose 24-22 to Argentina
- January 2010 -
Reinstated to England's Elite Player Squad
- August 2011 -
Overlooked for World Cup
- January 2012 -
Named England captain by new coach Stuart Lancaster despite solitary cap - least experienced captain since uncapped Nigel Melville in 1984
- November 2012 -
Criticised for his decision-making in successive defeats by Australia and South Africa
- December 2012 -
Guides England to record 38-21 win over New Zealand side unbeaten in 20 matches
"It is tough at the moment to pick who will get that job," former captain Tindall told BBC Radio 5 live.
"If we go in with a Grand Slam-winning team, he [Robshaw] will be hard-pushed not to be a number one candidate."
A number of names have been put forward for the role in Warren Gatland's side who travel to Australia this summer, including Ireland's Brian O'Driscoll and Jamie Heaslip.
Harlequins flanker Robshaw was first handed the England captaincy before last year's Six Nations.
However, his reign has not been without criticism - he came under fire for his decision to go for goal when England
were trailing South Africa 16-12
with just over a minute remaining in November.
But he recovered to lead England to a famous
38-21 win over New Zealand
in December before
retaining the captaincy for this year's Six Nations
and England are on the verge of a Grand Slam after wins over
Martin Johnson captained England to
World Cup glory
and their last
Grand Slam victory
in 2003 and Tindall, who played in that team, believes Robshaw can also become a great leader for his country.
He said: "Chris Robshaw's level of performance is so high every week you can always follow him.
"Jonno was exactly the same. He was not a a massive talker or shouter but just led from the front.
"If you looked at Jonno and played half as well or same level you knew you would have a good game and be doing the right things.
"The leadership aspects with Chris are still growing. If Chris can keep playing at the level he is week in week out he will ultimately get to that level and become a great captain for England."