Aguero should even have had more, having missed a sitter in the early stages and headed against bar on a dismal afternoon for Chelsea, whose manager Maurizio Sarri headed straight down the tunnel at full-time.
It was a stunned Sky Sports studio that had to provide the autopsy on Maurizio Sarri's sorry side who had capitulated so easily in the first half in east Manchester, with Jamie Carragher humorously stepping up the task with eloquence, managing to not only insult Chelsea, but also their London neighbours Arsenal. We need to understand and the reason is not easy.
"I don't know", Sarri said.More news: Toyota reveals Rav4 TRD 'Off-Road' model
Asked what he thought of Aguero's miss, Guardiola said: "He said to me he saw Kepa coming quick to close the space and he wanted to be precise, close to the post".
The record had been held by Eric Brook since1940, who had 158 goals to his name, but the Argentine equaled and then broke that record in an incredible attacking display at the Etihad Stadium.
He added: "I didn't see him at the moment but of course as usual I will go to say hello to him later as usual".
Sarri, though, did not think they were struggling for motivation this time. For the Blues, this was their fourth consecutive loss away from home in all competitions, with the aggregate score in their most recent three Premier League trips reading 12-0. "This type of person always helps to make our football better, and he tries to do it". The people don't understand how hard it is to do something. "People expect with a new manager and buying players it comes immediately, but it needs time".More news: Greater metro area sees 3 to 6.5 inches — Sunday snow totals
Winning that trophy alone will not be enough to keep him in a job, however. Instead, the day was about reclaiming top spot from Liverpool, and they did so in comprehensive fashion.
A Champions League round of 16 first-leg tie at Schalke follows on 20 February, before City meet Chelsea once more in the Carabao Cup final on 24 February.
Sergio Aguero's hat-trick against Chelsea sees him become Manchester City's all-time record league goalscorer. Christian Eriksen netted moments later and although Vardy got one back, Son Heung-min's late strike ensured third-placed Tottenham clinched a fifth win in their last six league games.
It does not get much more hard than that, although the Chelsea players and Sarri, who face City at Wembley on the same day, might beg to differ.More news: Possible wintry mix may bring snow, sleet, rain on Tuesday