Winston Reid struck in stoppage-time to sink Sunderland as West Ham sneaked a 1-0 win over the basement boys.
The Black Cats, still without a win this season, withstood an early Hammers onslaught and looked set to emerge with a point and a first clean sheet.
But, three-and-a-half minutes into the four added on, New Zealand defender Reid fired through a crowded penalty area to snatch West Ham's second win at their new London Stadium .
Sunderland began the match so deep that the Hammers merely set up camp in their half and created four clear-cut chances in the opening 10 minutes.
Late Reid goal gives Hammers victory
