Ex-India all-rounder Irfan Pathan has said India's Shreyas Iyer needs to improve his game as he struggles against fast bowlers. "Even in IPL...when it comes to fast bowlers who are bowling 140-plus, Shreyas has struggled a little. His strike rate has also gone down," added Irfan. Shreyas has scored 94 runs in his four innings in the South Africa T20Is.