Edited sentence: First they were accused of ball tempring since no one could understand the reverse swing phenomenon, but now it is reverred as an art.Former Pakistan international Sarfraz Nawaz was the founder of reverse swing during the late 1970s, and he passed his knowledge on to former team-mate and cricket legend Imran Khan.It was Imran who schooled bowlers Wasim Akram and Waqar Younis.Wasim Akram then brought reverse swing to the public limelight in early 1990's