West Ham defender Pablo Zabaleta has fired a warning at Chelsea over their 100 per cent record.

The Hammers' 3-1 win at Everton, courtesy of two goals from Andriy Yarmolenko and one from Marko Arnautovic, eased some of the pressure on manager Manuel Pellegrini following four straight defeats and took them out of the bottom three.

“Chelsea have a lot of quality but if we play with the same intensity and concentration as we did against Everton, then who knows? Anything can happen, especially at home, with the fans behind the team," Zabaleta said ahead of their next game.

“Chelsea have been one of the great teams so far this season but you always need to be positive and think you can win games."