The striker was smiling when he took the photo with the superstar at the Manchester Arena.
Aguero had helped his Manchester City side beat Watford 3-1 a day prior and looked to be enjoying some time off.
Raheem Sterling scored a hat-trick against Javi Gracia’s side as City strengthened their grip at the top of the table.
Liverpool responded on Sunday with a 4-2 victory over Burnley in which Sadio Mane and Firmino both scored a brace.
City next face Schalke in the Champions League on Wednesday where they hold a 3-2 aggregate lead.