But it was only Hazard's second hat trick in six years at Chelsea.
The Portuguese had to wait for his time to shine during City's record-breaking campaign last season, but is now Guardiola's main man in midfield with Kevin De Bruyne sidelined by a long-term knee injury.
Despite his pace, flair and artistry on the ball, the Belgium global just doesn't score enough.
Mitrovic drew a blank against Man City on Saturday, but since rejoining the Cottagers in the summer, the 23-year old Serbian worldwide has scored four Premier League goals in just five games - a haul that has got the attention of Chelsea as well as European suitors. We should be able to navigate this group easily and I'd therefore like to see some of the fringe players get a game.
"I can not handle myself when we miss simple things", said Guardiola, who said he was "angry" and "frustrated" at his team's display.
The Premier League leaders are also prepared to make an exception to their unwritten rule of not offering extensions that run longer than a year, instead handing him two more years over the current duration of his deal.
"We have to improve step by step, and my target is to become the best team in England in one year to 18 months".
Hazard has now scored 5 goals and assisted 2 in 5 Premier League appearances so far. "They have different characteristics, and it depends on the kind of match". "If you have seen the match today, you will say yes". I think [he can challenge for the golden boot].
"You're still looking at Lionel Messi, Cristiano Ronaldo, Neymar and Antoine Griezmann - and I don't think he's there yet". Does he believe me?
There is plenty of reason to think that Hazard is primed for the most prolific season of his Chelsea career.
We've traditionally been quite a good team to play if you want to break a winless run! He's going to score goals and he's going to perform in the way we want and we expect.