The Argentina striker is on fire under the Spaniard with nine goals in five games this season but suggests the guidance of the City boss will only improve him further.
"I'm really happy with the new manager," he said in the wake of his hat-trick in Wednesday night's 4-0 win over Borussia Monchengladbach.
"According to my style of playing, he is one of the managers that have helped me most in my career.
"I've improved in my game near the box and scoring goals, and with Pep I will get even more chances."
"We are playing with a different system this year, another way of playing. Each manager has his own style and we are adapting to Pep's tactics.
"We worked really hard on the pre-season and you are still doing every day."
Aguero serves the second game of his three-match FA ban against AFC Bournemouth this weekend.