"There is no doubt that Waqar was a great cricketer but as a coach he has failed to deliver the goods and he should be replaced," Abbas said.
Abbas, who was known as the Asian Bradman for his run-scoring feats, himself was last year attached with the national team as consultant but he was asked to step down after Pakistan's failure to qualify for the World T20 semifinals in Bangladesh.
"There are no excuses for the way we have been defeated in Bangladesh. It is very sad for Pakistan cricket. I never imagined our players will perform so badly," Abbas, a former captain, added.
Pakistan suffered a humiliating 0-3 whitewash in the ODI series and also lost the lone T20 International also.
Abbas further stated that not only did the Board need to make changes in the team management, including the head coach, but there was also the need to change the thinking of the players.