Ten-man Chelsea shrugged off a red card for captain Conor Gallagher to edge Brighton 3-2 while West Ham drew 1-1 with Crystal Palace.
Chelsea recorded just their second Premier League home win of the season against Brighton, despite being reduced to 10 men before half-time.
Mauricio Pochettino’s men were cruising midway through the first half after goals from Enzo Fernandez and Levi Colwill. Fernandez restored Chelsea’s two-goal cushion from the penalty spot, but Joao Pedro struck in stoppage time to heap the pressure on the home side.
Brighton were awarded a penalty for a handball by Colwill, but the referee reversed his on-field decision after reviewing the incident on the pitchside monitor and Chelsea held on.