"I don't know why he did it but it brought a bad name to the country, the good thing is that at least he realised his mistake and admitted it. I hope he does not repeat it again. Pakistan cricket does not need such incidents," Yousuf said.
The skipper returned here last night after a humiliating Australian tour where they were whitewashed in both one-day and Test series.
Afridi, who led Pakistan in the final one-dayer, was seen biting the ball and was later banned by the match referee for two Twenty20 matches on pleading guilty and apologising for his action.
Shoaib Malik will lead the side in the lone T20 match in Melbourne on Friday.
Yousuf said he does not intend to step down despite a disappointing performance Down Under.
"I accepted the captaincy for these difficult tours at a time when no player was willing to accept this challenge. I think I have done a decent job and I want to continue as captain, I will not resign," he said when asked to comment on statements from the PCB that they would appoint a new captain after the Australian tour.
Yousuf contended that statement like that affected performance of the team in the one-day series.
"It did affect our performances as it hit the morale of the team and some players started fancying their chances of becoming captain," he said, reacting to PCB Chairman Ejaz Butt's statement that younger player will be handed over the reins of the team.
The senior batsman said there was no need to make the statement during the series and even if the board wanted to remove him it was their decision.
"I admit our performance was bad throughout the series, it was an unsuccessful tour for us, but the results against Australia could have been better but our fielding and batting let us down."
Yousuf said he was not a defensive captain but tried to lead the team according to the situation and strength of team in both the series.
