Avram Grant was made to endure a nightmare birthday at Upton Park as his side sunk to the bottom of the table after losing a vital six-pointer 1-0 against relegation rivals Birmingham.
Nikola Zigic dealt the fatal blow midway through the second half when he nodded home from a Sebastian Larsson free-kick to seal the win and move Birmingham up to 16th.
Substitute Demba Ba rattled the woodwork on his debut but otherwise, the Hammers rarely threatened the visitors' goal and Grant's position will now undoubtedly come under more scrutiny as a result.
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