Aguero challenged Massey-Ellis’ decision to give Arsenal a throw-in in the first half of City’s 1-0 win at the Etihad on Saturday night.
The Argentine, who was making his first City appearance since June after undergoing knee surgery, has not been punished but has faced criticism on social media for his role in the incident.
Micah Richards, a former Aguero teammate at City, said the 32-year-old “should know better” and Aguero was also censored by Match of the Day expert Ian Wright.
The laws of the game state that any “physical or aggressive behavior” against a match official is considered a sent off offense.
Guardiola played down the incident, however, insisting that Aguero’s actions were not aggressive.
” Come on guys. Sergio is the nicest person I have ever met in my life, ”said the city manager. “Look for problems in other situations, not in this one. “
Aguero played 65 minutes on his return to the city side and was instrumental in Raheem Sterling’s decisive goal, which saw Guardiola beat his former assistant Mikel Arteta.