It is very rare that the Kookubura ball (with which Tests are played in Australia), swings as late as after 70 overs. But this is exactly where the class of a bowler comes in. And there is no iota of doubt that Mitchell Starc is a world class bowler.source https://timesofindia.indiatimes.com/sports/cricket/news/watch-mitchell-starcs-peach-of-a-delivery-to-dismiss-sarfaraz-ahmed-at-perth/articleshow/106044275.cms