New Melbourne coach Paul Roos is keeping an open mind on whether Jack Grimes and Jack Trengove should stay co-captains of the AFL club.

But like every other part of the team, the Demons’ on-field leadership will come under a searching review in the Roos regime.

Roos will bring in Ray McLean’s Leading Teams, a consultancy that worked brilliantly when he coached Sydney.

Leading Teams had a key role a decade ago in establishing the “Bloods” culture that continues to define this dominant era at the Swans.

“In that system, the players vote for their leadership group and, out of that, myself, the board and Peter (Melbourne chief executive Peter Jackson) will ratify the captain or captains,” Roos said.

Roos added that he was happy to keep the two Jacks as captains if it would help them.

“I need to make them the best players they can be and that’s my priority,” he said.

“If that means them being captain, they’ll be captain.

“If it means them not being captain, they won’t be captain.

“We touched on that briefly with the boys, but they will be part of that process.”

Trengove was only 20 when he became the youngest captain in AFL history last year and Grimes was just 22.

While Roos is open minded about the captaincy, he said Melbourne’s game plan needed a radical overhaul.

“All I can do is give a commitment that we’ll work as hard as we possibly can and put a game style in place that I believe eventually will be successful and hope the players embrace it quickly,” Roos said.

“It doesn’t have to be a lockdown, defensive style where you have four of five taggers.

“What we need to teach the guys, and what Sydney do better than any other team, is that defensive transition running – running hard up and back, running hard up and back.

“AFL is a tough game if you want to be successful.

“There’s no magic formula and there’s no magic fix.”