"Dhoni has not been able to prove himself as a Test cricketer. Besides, concentration is lacking in Yuvraj. There is some fault in his technique somewhere. He appears over confident," the former all-rounder said on the sidelines of a workshop on latest technique of skin and hair care treatment, organised by his firm 'Naturence Research Laboratory (p) Ltd'.

"One needs to be good enough to play in Test cricket," he said speaking on the performance of Dhoni and Yuvraj at ODIs, Twenty20 and Test matches.

Opposing Twenty20 cricket, he said that ‘it is very good entertainment, but not the real cricket.’

"It (T20) is even adversely affecting ODI cricket," he added.

On Sourav Ganguly, Rahul Dravid, VVS Laxman and Sachin Tendulkar's inclusion in the Test squad against the Aussies, Prabhakar appreciated Chief Selector K Srikkanth in giving them the ‘opportunity’.

"These players have done more than enough to the game. They have given their best to cricket. They should themselves decide when to say goodbye to the game," he said.

Prabhakar, however, said that former cricketers should stay connected to the game and help shape the future of upcoming youngsters.

He said that a player could perform even at the age of 36 provided he is fit.

About the present bowling attack of the Indian team, he said there was a ‘very healthy competition’ among the pacers, but the side lacked a second line of bowlers in the spin department after Anil Kumble and Harbhajan Singh.

On Harbhajan and S Sreesanth's participation in a TV dance show, Prabhakar said there was nothing wrong in it provided they keep it in mind that their focus should be on cricket.