Diafra Sakho came in from the cold to hit a last-minute winner and dig West Ham manager Slaven Bilic out of a hole.
The London Stadium was almost in open revolt following an insipid 89 minutes from the home side against Swansea.
But Sakho, who if he had got his way on transfer deadline day would now be in France playing for Rennes, climbed off the bench to secure a 1-0 win and bail out his boss.
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