Manchester City moved to within three points of the league leaders as two goals from former West Ham hero Carlos Tevez helped overcome the Hammers.
Tevez side-footed home Martin Petrov's cross from six yards out but Carlton Cole levelled with a neat back-heel.
Petrov, making his first league start of the season, curled a low, 25-yard free-kick into the corner of the net.
Tevez's header from Craig Bellamy's free-kick sealed victory and secured City's best league start since 1961.
The win moved City up to fifth in the Premier League, level on points with fourth-placed Tottenham and third-placed Liverpool and three points behind joint leaders Manchester United and Chelsea.
West Ham remain without a win in five matches and languishing in the bottom three.
City started brightly and could have been three goals up inside 15 minutes.
They had to settle for only one and it came after five minutes through Tevez, the former Hammers' favourite who helped lead the Londoners to Premier League survival in 2007.
Bulgarian winger Petrov found space out wide, following Gareth Barry's flick-on, and squared it to the unmarked Argentine, who from six yards out side-footed into the roof of the net for his first league goal of the season.read more
