Ex-England captain Kevin Pietersen has slammed Alastair Cook over his "sitting on his arse in IPL" remark on RCB all-rounder Jacob Bethell. "Alastair has absolutely no idea what it's like to be in IPL. What's it's like to always be around...best players...So his opinion on...doesn't matter at all," he said. Cook had urged Bethell to return to county cricket.