Match ends, West Ham United 0, Chelsea 0.
Chelsea dropped points for the first time this season after a frustrating London derby at West Ham.
The visitors enjoyed 71% of possession at London Stadium, but failed to score for the first time this season.
Despite seeing little of the ball, West Ham had the best chance to win it as Robert Snodgrass picked out the unmarked Andriy Yarmolenko on 78 minutes, but the Ukrainian sent his header wide.
Second-half substitute Alvaro Morata almost made an instant impact for Chelsea, but he was unable to steer the ball past Lukasz Fabianski from close range, as Chelsea missed their chance to keep pace with league leaders Liverpool.
Maurizio Sarri's men remain third after Manchester City won on Saturday, while Manuel Pellegrini's side stay in 17th.
More to follow.
Match ends, West Ham United 0, Chelsea 0.
Second Half ends, West Ham United 0, Chelsea 0.
Robert Snodgrass (West Ham United) is shown the yellow card for a bad foul.
Willian (Chelsea) wins a free kick on the right wing.
Foul by Robert Snodgrass (West Ham United).
Attempt blocked. Willian (Chelsea) right footed shot from a difficult angle on the right is blocked. Assisted by Jorginho.
Corner, Chelsea. Conceded by Lukasz Fabianski.
Attempt saved. Ross Barkley (Chelsea) right footed shot from outside the box is saved in the bottom right corner. Assisted by Eden Hazard.
Offside, Chelsea. Eden Hazard tries a through ball, but N'Golo Kanté is caught offside.
Ross Barkley (Chelsea) wins a free kick in the defensive half.
Foul by Lucas Pérez (West Ham United).
Offside, West Ham United. Lucas Pérez tries a through ball, but Pedro Obiang is caught offside.
Hand ball by César Azpilicueta (Chelsea).
Substitution, West Ham United. Carlos Sánchez replaces Mark Noble.
Corner, Chelsea. Conceded by Pablo Zabaleta.
Attempt missed. N'Golo Kanté (Chelsea) left footed shot from the centre of the box is too high. Assisted by Willian.
Offside, Chelsea. Jorginho tries a through ball, but Willian is caught offside.
N'Golo Kanté (Chelsea) wins a free kick on the right wing.
Foul by Arthur Masuaku (West Ham United).
Substitution, Chelsea. Ross Barkley replaces Mateo Kovacic.
Attempt missed. Andriy Yarmolenko (West Ham United) header from the centre of the box is close, but misses to the right. Assisted by Robert Snodgrass with a cross.
Attempt saved. David Luiz (Chelsea) right footed shot from outside the box is saved in the bottom right corner.
Mateo Kovacic (Chelsea) wins a free kick in the attacking half.
Foul by Mark Noble (West Ham United).
Substitution, West Ham United. Robert Snodgrass replaces Felipe Anderson.
Foul by Mateo Kovacic (Chelsea).
Pedro Obiang (West Ham United) wins a free kick in the attacking half.
Corner, Chelsea. Conceded by Pablo Zabaleta.
Attempt blocked. Eden Hazard (Chelsea) header from the left side of the box is blocked. Assisted by César Azpilicueta with a cross.
Jorginho (Chelsea) wins a free kick in the attacking half.
Foul by Mark Noble (West Ham United).
Substitution, Chelsea. Gary Cahill replaces Antonio Rüdiger because of an injury.
Delay over. They are ready to continue.
Delay in match Lukasz Fabianski (West Ham United) because of an injury.
Attempt saved. Álvaro Morata (Chelsea) right footed shot from the centre of the box is saved in the centre of the goal. Assisted by David Luiz.
Corner, Chelsea. Conceded by Issa Diop.
David Luiz (Chelsea) wins a free kick in the defensive half.
Foul by Lucas Pérez (West Ham United).
Substitution, West Ham United. Lucas Pérez replaces Michail Antonio.
Substitution, Chelsea. Álvaro Morata replaces Olivier Giroud.