Richie McCaw knows how to beat the British and Irish Lions having done so twice in his esteemed New Zealand career.
The former All Blacks captain, who retired in 2015 with 148 international caps to his name, could give the current side a tip or two ahead of their two-Test series.
But, speaking exclusively to the Daily Mail, McCaw explains why Warren Gatland's men should give extra special care to four All Blacks.
Brodie Retallick
"For a big man, he's got so much skill, so much presence and he doesn't take any nonsense. He's really good at the basics - catch and pass - under pressure to link the backs and the forwards. He's not just a big hitter, he's been a big asset for the All Blacks over the last year."