Jason Gillespie has no doubt Joe Root is the right man to captain England after overseeing his development with county side Yorkshire.
Root is currently England's vice-captain and is the overwhelming favourite to replace Alastair Cook, who resigned as Test skipper on Monday.
Scotches fears over effect on Root's batting
But fears have been expressed that captaincy will damage Root's batting, with former England off-spinner Graeme Swann insisting even the vice-captaincy has already been a burden as the 26-year-old is no longer "the cheeky, dynamic joie de vivre-type player he was two or three years ago."
Gillespie, himself a former Australia fast bowler, is convinced, however, that those doubts are groundless after observing Root's development during five years as Yorkshire coach
"I understand the point he's trying to make," Gillespie, who returned to Australia last year for family reasons, told the Guardian.
"No other candidates more qualified"
"And no one wants Joe to lose his swagger or that inherent cheekiness but this is a guy who is maturing all the time. He's played 53 Tests, he's 26 years old and he is ready to go," added Gillespie, whose successful time at Headingley included guiding Yorkshire to back-to-back County Championship titles.
"During my time in England I picked up a slight reluctance to give young guys leadership responsibility. But looking at the set-up, I don't think there are any other candidates more qualified to take the role on than Joe Root."
Impressed in temporary stint as Yorkshire captain
While Root has only led Yorkshire in three Championship matches, Gillespie said a brief stint as acting skipper against Surrey last year convinced him of his tactical acumen.
"Our captain, Andrew Gale, went off for a few overs to see the physio, Joe took over and immediately brought himself on to bowl.
"That might seem like a bit of bravado but he simply weighed up the situation. There were two left-handers (Kumar Sangakkara and Steven Davies) at the crease, our main spinner Adil Rashid turns the ball into them, so let's try something different.
"He changed the field, brought catchers in, and lo and behold he picked up both wickets inside four overs.
"That was the kind of captaincy move that told me Joe won't be a guy who lets the game meander. He will be a leader who is always thinking two steps ahead."