Diego Costa's late goal helped Chelsea defeat West Ham 2-1 and made Antonio Conte a winner in his debut as manager at Stamford Bridge on Monday.
Eden Hazard's penalty early in the second half had put Chelsea ahead, and Conte's side looked to be in full control until James Collins' equaliser in the 77th minute.
But Costa, who was perhaps fortunate to still be on the pitch after a wild tackle, struck in the 89th minute to give Chelsea all three points.
Chelsea's first chance to take the lead came in the 12th minute as Branislav Ivanovic got forward into the box and cut inside, only for Adrian to make a diving save at the near post.