"He has to tone down. You cannot be like that always. I know he is very good player. He has a big reputation. He is considered as the future captain and he has to behave like a captain," Azharuddin told reporters here.
Kohli, who successfully captained India to a 3-0 unassailable lead against Zimbabwe in the ongoing ODI series, has been in news on and off for his dose of aggression and on-field spats.
"Kohli's nature is different, I understand that but then everybody looks upto him. Being aggressive is good but he has to be aggressive from inside, showing it on the outside won't help. If he tones down a little bit it will be good for him," said Azharuddin, under whose captaincy India have won 103 ODIs and 14 Tests.
With the young Indian side winning three tournaments -- Champions Trophy, ODI series in West Indies and one-dayers in Zimbabwe, -- on the trot, Azharuddin felt it would be difficult for the out-of-favour seniors to make a comeback into the national squad.
