It was the Argentine's 150th league goal for City, a landmark that moved him level with Michael Owen in eighth place on the Premier League's all-time goalscoring list.It appeared City were capable of scoring nearly at will and a slick move saw them make it three in the 18th minute.
Chelsea have made a good start to life under Sarri as the Italian equalled the Premier League record of most games unbeaten for a new manager.
City fans will be hoping that Aguero can surpass the other two men on the list; he still has plenty of games left in his legs yet to achieve the aim, and in doing so could fire them to another Premier League crown.
The 27-year-old has only featured in one Europa League match so far this campaign, and even that was as a substitute against MOL Vidi.
The Belgian global is expected to feature against BATE but Sarri may resist the temptation to start the attacker so Hazard may be saved for the Premier League clash with Everton on Sunday afternoon.
The win moved Chelsea above Liverpool into second place courtesy of a superior goal difference.
City now have a two-point cushion at the summit of the Premier League table after thrashing Southampton 6-1 at the Etihad on Sunday.
"We know that to get to that chance, you have to get the three points in games like we had against Crystal Palace".
"We can not drop points, we need to work hard, keep improving".
"We are happy with our results".
I would relish the chance to toast a sixth Champions League win for Liverpool in the wonderful city of Madrid next May and it is certainly a possibility when you look at the troubles some of the top clubs in Europe are dealing with right now. "We know that it's going to be hard, but we know how to win the Premier League and we will try".
"Man City are better than Liverpool, everyone knows that, that's no problem".
After being held by Arsenal over the weekend, Jurgen Klopp's side fell two points off the pace as City have now won nine of their opening 11 league games.
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