English Premier League champions draw against Arsenal at the Emirates . Costa impresses again for Chelsea . The Gunners are currently second in the table and have a game in hand on their title rivals but they will be without captain Cesc Fabregas for Saturday's clash with West Ham United Martin Demichelis 83rd-minute header 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 . The Gunners are currently second in the table and have a game in hand on their title rivals but they will be without captain Cesc Fabregas for Saturday's clash with West Ham United Martin Demichelis 83rd-minute header ensures City steal a point . Diego Costa scores hat-trick as Chelsea keep 100 % record .