Sam Warburton believes Maro Itoje has the edge over Alun Wyn Jones in the race to become British and Irish Lions captain for the summer tour to South Africa.

A week after another former Lions skipper in Paul O'Connell endorsed the credentials of Owen Farrell, Warburton claimed that Itoje's status as a certainty for the Test team is a major factor in his favour.

The Saracens second row was one of England's better performers in a poor Six Nations, but his high penalty count appeared to dent his chances of being chosen for the role by Warren Gatland.

But Warburton, Lions captain in 2017 and 2019, does not see that as an obstacle for a player who excelled in New Zealand four years ago and offers more than Wales talisman Jones.

"I've gone back and forth, but I'll go with who I thought at the very beginning and that's Maro Itoje," Warburton said.

"Anybody who looked at the first game of the Six Nations against Scotland where he conceded four or five penalties would say 'oh you can't do that', but that was a bit of rustiness.

"Warren will want him primed and ready to go as he's one of the players who will be a guaranteed Test starter. I was extremely impressed with him in 2017 and Warren would have seen all that as well.

"The other captaincy candidates are a little bit older. You question whether it would be a bit too much pressure for them to go through a tour like this at the end of the season.

Watson was named player of the 2021 Six Nations and Warburton rubbishes the claim that the powerful Scotland flanker, who stands 6'0 and is 16 stones, is too small to face the Springboks.

"Hamish Watson is never too small. Power trumps size every day of the week. I think that Warren Gatland would be purring watching Hamish Watson over the Six Nations," he said.

"As things are right now he's a Test starter and I can't wait to see how he goes in the warm-up games."

* Sam Warburton was speaking as Canterbury launched the British & Irish Lions Test Jersey. Get yours from www.canterbury.com".