British & Irish Lions coaching legend Sir Ian McGeechan has urged likely 2013 boss Warren Gatland to take his time before picking his Lions captain.
Current Wales head coach Gatland is expected to succeed Scot McGeechan as the next touring chief ahead of next year's Lions tour of Australia.
And McGeechan has given him some advice.
"Some players have come through last season, but the second season often challenges them in a different way," he told Press Association Sport.
"We need to see which of them are really able to kick on. There are a lot of unknowns when it comes to selecting the squad, and it's the same with the captaincy.
"There are people like Chris Robshaw of England coming through and it will be interesting to see how he shapes up with another 12 months under his belt.
"Sam Warburton is an obvious choice and he already has a relationship with Warren.
"You need to see how someone is playing, his demeanour and rapport with players and support staff. You have to be disciplined and make a late call on it.
"In 2009 we didn't make the call until late April, which gave me the time to speak to all the international coaches."