Arsenal returned to the top of the Premier League on Sunday after Jack Wilshere rescued a point for them in a 1-1 draw at West Bromwich Albion, while rivals Tottenham Hotspur suffered a shock 3-0 thumping by West Ham United.
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Chelsea relied on two goals in two minutes by substitutes Eden Hazard and Willian late in their match at Norwich City to give them a 3-1 win that lifted them to third in the league with 14 points from seven games, two behind Arsenal and Liverpool.
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Surprise package Southampton won again to go fourth, beating Swansea City 2-0 at home, while the day's big upset was at White Hart Lane.
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Spurs, who had conceded only twice in the league, leaked three in 13 second-half minutes including an individual effort by Ravel Morrison that West Ham manager Sam Allardyce dubbed 'genius'.