liverpool manager said raheem sterling is ` going nowhere ' this summer .
brendan rodgers said club are a ` superpower ' and do n't have to sell stars .
sterling in relaxed mood as liverpool trained on thursday morning .
england star joked with daniel sturridge and shook hands with rodgers .
sterling said on tv he is not ready to sign a £ 100,000-a-week contract .
rodgers said the bbc interview took everyone at club by surprise .
contract talks look set to be dragged out to the summer .
sterling admitted in interview he is ` flattered ' by interest from arsenal .