"At the end of the day the selectors can only pick the best squad and the coaches can also give their best input but the players have to perform and justify their selections," he told a media conference in Lahore.
Haroon, 62, who has also remained on the national selection committee in the past and also worked as manager and coach of the national side and A teams made it clear that he would expect more consistency from the players.
Haroon, who played 23 Tests and 12 one-day internationals, also made it clear he wouldn't like to make tall claims about what he can do for Pakistan cricket.
"I am not going to make tall claims because the fact is our team is not the best in the world and we have a lot of hard work to do to put things right. If we are to match the top four-five teams in the world we have to improve our consistency, fitness and fielding levels a lot."
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"The players are professionals and are selected to do their best. We will not expect anything less from them. Places should not be taken for granted."
The chief selector said the selectors would be giving priority to searching for new talent and giving confidence to the existing ones.
"As long as I do my job honestly I am not worried about the criticism that can come our way. What is most important for me is that we play our role in taking Pakistan cricket forward.