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. "Maybe I will have to change 11 players, maybe five, I don't know".
Chelsea were not many pundits' tip for the Premier League title before this season started.
"We need to move the ball quicker, I think".
Cesar Azpilicueta, a two-time Premier League victor with Chelsea, said they must try to challenge for the title this season.
Arsenal didn't have to travel for its Europa League match and had mostly fielded a reserve team in its 4-2 win over Ukrainian side Vorskla Poltava on Thursday.
- This was only Chelsea's second goalless draw in their last 48 away Premier League games (also 0-0 against Everton in December 2017).
The experienced stopper is quickly becoming a favourite of the West Ham crowd through his performances.
"It's important for me to showcase my talent, obviously a year ago I played in defence and now in midfield, I'm just cherishing it". Better in the second half. "Hazard in the last 25 minutes did very well, more on the right than the left, but it was very hard for the striker and the two wingers". "I know that, in the future, probably, I will have to face more difficulties".
Arthur Masuaku was called out by Irons supporters during and after the match as Twitter users criticised his ability to defend properly on the left flank and referring to him as the worst player on the pitch.
Speaking ahead of Sunday's Premier League trip to West Ham, Wednesday's Carabao Cup clash at Liverpool and the Reds' league visit to Stamford Bridge next Saturday, Sarri concurred with Chelsea predecessors Jose Mourinho and Antonio Conte on domestic fixtures which surround European games.