London: Manchester City's bid to put pressure on Premier League leaders Chelsea suffered a setback as the champions slumped to a surprise 2-1 defeat at West Ham on Saturday.


Manchester City 'keeper Joe Hart fails to stop Diafra Sakho’s header from crossing the line at Boleyn Ground on Saturday. Pic/Getty Images  

Manuel Pellegrini's team, who kicked off in second place, had hoped to close the gap on the Blues to two points ahead of their rivals' clash with Manchester United on Sunday.