Here, Press Association Sport looks at five talking points from the games played
STAR NAMES ARE BEING LEFT IN THE SHADE
Last season's star trio of Sergio Aguero, Eden Hazard and Alexis Sanchez have only two goals between them - Riyad Mahrez of Leicester and Bournemouth's Callum Wilson have five apiece
It is early days, but the form of the lesser-fancied clubs and players is eye-opening.
EUROPE IS A HEADACHE FOR MANCHESTER CITY
For all their spending power, Manchester City still struggle to come to terms with the demands of playing in the Champions League and Premier League
Juventus opened the wound in midweek and West Ham rubbed salt into it in agonising style, illustrating that City were still feeling the effects of that match in Europe
Manuel Pellegrini needs to sort out this weakness - and quickly.
DIEGO COSTA IS KIND, CONSIDERATE AND SPORTSMANLIKE
OK so we didn't learn that - his antics against Arsenal merely confirmed him as the Premier League's leading hate figure
What the referees and assistants are learning however is that he keeps pulling the wool over their eyes - his comeuppance can surely not be too far away.
IT'S A NIGHTMARE IN THE NORTH-EAST
If last season was a tough time to be a fan of Newcastle and Sunderland, this season is looking even worse with the deadly rivals propping up the Premier League table
Newcastle boss Steve McClaren is clearly no miracle worker, while Sunderland's squad looks substantially short on quality.
VAN GAAL IS FEELING MIGHTY SMUG
Some performance for the £36million teenager Anthony Martial, with two goals at Southampton on his first Premier League start
Manchester United boss Louis van Gaal could be forgiven for saying 'I told you so'.
Source : PA
Source: PA