Mamady Sidibe headed a late winner for Stoke as they condemned fellow Barclays Premier League newcomers West Brom to a third successive defeat following the 1-0 result.
The rematch between the top two in last season's Coca-Cola Championship fell some way short of top-flight standards for long periods in a match heavy on industry but short on attacking flair.
Stoke spent much of the second half attempting to tease a mistake out of goalkeeper Scott Carson, following his blunder for England in midweek, but when the winner came it was the bottom side's defence that made Sidibe's job too easy.
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