Mohammad Hafeez admitted that Pakistan's bowling department is a concern after his side secured their spot in the Super Eights stage of the World Twenty20 tournament.

Imran Nazir's entertaining innings against Bangladesh on Tuesday ensured Pakistan progressed from the group stage and Hafeez is delighted with the team's attitude.

"It's a great team effort. The boys have shown the right attitude so far in this tournament," the skipper said. "There's a little bit of a concern about our fast bowlers, but I am very happy as captain and the team is responding to me.

"Bangladesh played well but our batting was good. Imran Nazir was exceptional. We always need a good start when we're chasing.

"We've had a good time here, playing positively and hopefully we will do better in the Super Eights."

Pakistan will play India, South Africa and Australia in the next stage of the competition.