Slaven Bilic conceded West Ham had produced a "slow, flat" performance as they laboured to a 1-1 Premier League draw at home to Stoke.
They briefly led in the second half when an own goal from Glenn Whelan put them into contention for a third straight victory at the London Stadium.
Erratic goalkeeping from Adrian then gifted Bojan Krkic the equalising goal, ensuring they sit in 16th place and four points above the bottom three ahead of a difficult run of fixtures.
Bilic's team next visit Tottenham before two games with Manchester United and further fixtures with Arsenal and Liverpool.