Hazard told Sarri after returning from the September global break with Belgium and his hat-trick in the 4-1 win over Cardiff that he was exhausted.
Noble pleads innocence however, simply saying "it wasn't me" - although his cheeky grin maybe indicates he had something to do with it.
Chelsea were not many pundits' tip for the Premier League title before this season started.
The Blues are off to a rapid start under Maurizio Sarri, and now sit atop the Premier League table.
"We need to move the ball quicker, " Sarri said, "and we need more movement without the ball".
The sight of the 27-year-old improbably trying to get his head on the ball in the West Ham penalty area was as frustrating as Chelsea's defence being exposed when the Hammers counterattacked.
West Ham hopeful key striker will be fit for Chelsea clash
But Marko Arnautovic gave West Ham a two-goal cushion again after finishing off a fine move in the 60th minute on Merseyside. The 31-year-old insists that West Ham have a good squad and need to make sure they can keep winning at the London Stadium.
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"In Italy, it's possible, " said Sarri, who arrived in the offseason from Italian side Napoli.
"I knew West Ham were a very good team and I don't know why they lost their first four matches". Eden Hazard has let the way, notching five goals through five games.
"For an English team, it is very hard to play in the Europa League with the Premier League rules", the 59-year-old added.
Sarri also refused to use Europa League fatigue as an excuse after Chelsea's ideal start to the season ended. Here I have to play 64 hours after a Europa League match.
Alexandre Lacazette and Pierre-Emerick Aubameyang scored goals within three minutes of each other early in the second half at Emirates Stadium.
But if the German is not ready to face Liverpool on Saturday, Langley says Cahill must be the man to step in at Anfield; he has fewer concerns about the EFL Cup game between the two teams on Wednesday. "We played a good tactical game, defended well and created some chances". Now our opponents are starting to know Chelsea well so we need to bring something else.
"[Modric] obviously was not happy that I would leave because we had three awesome years together winning a lot of trophies".