Former Australia cricket coach John Buchanan has responded to Michael Clarke's scathing criticism, insisting the retired captain has a lot of growing up to do.
Clarke did not hold back in his assessment of Buchanan's achievements as coach of the national team between 1999 and 2007, claiming in his Ashes Diary 2015 that even a dog could have led Australia to world domination.
Buchanan hit back via his website and called for Clarke to improve his leadership skills, highlighting former All Blacks skipper Richie McCaw as a prime example of a leader.
"Being a captain, coach, corporate leader is not easy. Each is driven by a relentless passion to inspire others to succeed. The leadership skills that accompany these roles are demanding and complex," Buchanan wrote on Saturday.
"The opportunity to continue to learn these skills is always available, and hopefully Michael will continue to take these opportunities as they will be presented in his future life and careers."
Buchanan added: "There is one recent event which I believe makes further comment pertinent, and hopefully useful for Michael, and young aspiring leaders like him in their respective futures.
"In the last couple of days Richie McCaw long serving captain of the ALL BLACKS [AB] announced his retirement, weeks after the conclusion of his and the team's crowning glory - back-to-back World Cup victories.
"There would be precious few people around the world who would say that Richie McCaw did not distinguish himself on the field as well as off. As captain, he led a team that performed at the highest level with a winning record verging on 90 per cent.
"As a leader, he inspired all those around him, and all those that followed him and the ALL BLACKS, through his deeds and actions. As a person, he lived and breathed the values and principles of the ALL BLACKS, and ensured the legacy, begun over 100 years ago, was enhanced during the time that he spent in the company of the AB traditions and brand."