West Ham manager Manuel Pellegrini said his team "were like zombies" in the opening half of their 2-0 Premier League loss to Chelsea.
Real Madrid target Eden Hazard was the star of the show with two goals as Chelsea defeated West Ham at Stamford Bridge on Monday.
Hazard opened the scoring thanks to a stunning solo goal in the 24th minute before he sealed the result in the closing stages.
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Pellegrini lamented West Ham's display in the first 45 minutes, telling BBC Sport: "We improved a lot after the first half.