Steven Naismith scored a hat-trick as Chelsea's struggles continued with a third loss in their opening five league games following a defeat at Everton. Arsenal recorded their first home win of the season as goals from Theo Walcott and Olivier Giroud beat Stoke. Premier League leaders Manchester City continued their 100% start to the season with an injury-time winner over nearest challengers Crystal Palace. Wes Hoolahan inspired Norwich to an impressive victory over fellow promoted side Bournemouth.