The left-hander, who exhibited his exquisite form during India's title triumph in the Twenty20 World Cup in South Africa, said the team needed a coach to keep things under control in the dressing room.
"You need somebody to control the boys and talk to them," Yuvraj told Headlines Today.
Although a huge fan of the Twenty20 format of the game, Yuvraj said he considered Test cricket as the real challenge for a player.
"Test cricket is toughest to play," he said.
He said the fact that there was no pressure to perform on the Indian team helped the side do well at the Twenty20 World Cup.
"Nobody expected us to win, so there was no pressure on us. We played without any fear and won," he remarked.
Giving a thumbs up to Mahendra Singh Dhoni's captaincy, Yuvraj said, "he did a great job while shouldering the huge responsibility for the first time."
The aggressive batsman was optimistic about India's chances in the ongoing seven-match one-day series against Australia.
"If we play as well as we did in South Africa, we can beat them this time too," he said.