English Premier League Chelsea play against Arsenal at the Emirates . Aguero gives City the lead before Wilshere and Rooney strike back for Gunners . Alex Demichelis 83rd - minute goal ensures City steal a point . Diego Costa scores hat - trick as Chelsea keep 100 % record .
English Premier League champions draw against Arsenal at the Emirates . Aguero gives City the lead before Wilshere and Sanchez hit back for Gunners . Martin Demichelis 83rd-minute header ensures City steal a point . Diego Costa scores hat-trick as Chelsea keep 100 % record .