straight to your inboxPep Guardiola got the response that he wanted from Raheem Sterling after challenging all of his Manchester City players to improve their performances.The City boss has made it a mission of the last fortnight as nearly all of his squad have returned to full fitness to try to raise the competition for places, and the hat-trick from Riyad Mahrez against Burnley set the standard for the rest of the attack to follow.Sterling, left on the bench in recent games having been