Imam-ul-Haq hit a measured century -- and delivered a message to his critics -- as Pakistan piled up 317 for six in the third one-day international against South Africa on Friday.

As Imam completed the single that took him to his fifth century in his 19th one-day international he pointed to his mouth as his lips moved vigorously. He was out almost immediately afterwards for 101, made off 116 balls with eight fours.